Backed out changeset e684bf18e5d9 (bug 1299040) for bad implicit conversion constructor bustage

CLOSED TREE

dom/presentation/PresentationCallbacks.cpp

@@ -10,11 +10,10 @@
 #include "nsIPresentationService.h"
 #include "nsIWebProgress.h"
 #include "nsServiceManagerUtils.h"
-#include "nsThreadUtils.h"
 #include "PresentationCallbacks.h"
 #include "PresentationRequest.h"
 #include "PresentationConnection.h"
-#include "PresentationTransportBuilderConstructor.h"
+#include "nsThreadUtils.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;
@@ -202,11 +201,7 @@ PresentationResponderLoadingCallback::NotifyReceiverReady(bool aIsLoading)
     return NS_ERROR_NOT_AVAILABLE;
   }
 
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor =
+  return service->NotifyReceiverReady(mSessionId, windowId, aIsLoading);
-    PresentationTransportBuilderConstructor::Create();
-  return service->NotifyReceiverReady(mSessionId,
-                                      windowId,aIsLoading,
-                                      constructor);
 }
 
 // nsIWebProgressListener

dom/presentation/PresentationDataChannelSessionTransport.js

@@ -48,8 +48,7 @@ function PresentationTransportBuilder() {
 PresentationTransportBuilder.prototype = {
   classID: PRESENTATIONTRANSPORTBUILDER_CID,
   contractID: PRESENTATIONTRANSPORTBUILDER_CONTRACTID,
-  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationSessionTransportBuilder,
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationDataChannelSessionTransportBuilder,
-                                         Ci.nsIPresentationDataChannelSessionTransportBuilder,
                                          Ci.nsITimerCallback]),
 
   buildDataChannelTransport: function(aRole, aWindow, aListener) {

dom/presentation/PresentationRequest.cpp

@@ -26,7 +26,6 @@
 #include "PresentationAvailability.h"
 #include "PresentationCallbacks.h"
 #include "PresentationLog.h"
-#include "PresentationTransportBuilderConstructor.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;
@@ -208,16 +207,7 @@ PresentationRequest::StartWithDevice(const nsAString& aDeviceId,
     do_QueryInterface(GetOwner()->GetChromeEventHandler());
   nsCOMPtr<nsIPresentationServiceCallback> callback =
     new PresentationRequesterCallback(this, id, promise);
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor =
+  rv = service->StartSession(mUrls, id, origin, aDeviceId, GetOwner()->WindowID(), handler, callback);
-    PresentationTransportBuilderConstructor::Create();
-  rv = service->StartSession(mUrls,
-                             id,
-                             origin,
-                             aDeviceId,
-                             GetOwner()->WindowID(),
-                             handler,
-                             callback,
-                             constructor);
   if (NS_WARN_IF(NS_FAILED(rv))) {
     promise->MaybeReject(NS_ERROR_DOM_OPERATION_ERR);
   }

dom/presentation/PresentationService.cpp

@@ -107,14 +107,12 @@ public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIPRESENTATIONDEVICEREQUEST
 
-  PresentationDeviceRequest(
+  PresentationDeviceRequest(const nsTArray<nsString>& aUrls,
-              const nsTArray<nsString>& aUrls,
+                            const nsAString& aId,
-              const nsAString& aId,
+                            const nsAString& aOrigin,
-              const nsAString& aOrigin,
+                            uint64_t aWindowId,
-              uint64_t aWindowId,
+                            nsIDOMEventTarget* aEventTarget,
-              nsIDOMEventTarget* aEventTarget,
+                            nsIPresentationServiceCallback* aCallback);
-              nsIPresentationServiceCallback* aCallback,
-              nsIPresentationTransportBuilderConstructor* aBuilderConstructor);
 
 private:
   virtual ~PresentationDeviceRequest() = default;
@@ -127,7 +125,6 @@ private:
   uint64_t mWindowId;
   nsWeakPtr mChromeEventHandler;
   nsCOMPtr<nsIPresentationServiceCallback> mCallback;
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> mBuilderConstructor;
 };
 
 LazyLogModule gPresentationLog("Presentation");
@@ -138,26 +135,23 @@ LazyLogModule gPresentationLog("Presentation");
 NS_IMPL_ISUPPORTS(PresentationDeviceRequest, nsIPresentationDeviceRequest)
 
 PresentationDeviceRequest::PresentationDeviceRequest(
-               const nsTArray<nsString>& aUrls,
+                                      const nsTArray<nsString>& aUrls,
-               const nsAString& aId,
+                                      const nsAString& aId,
-               const nsAString& aOrigin,
+                                      const nsAString& aOrigin,
-               uint64_t aWindowId,
+                                      uint64_t aWindowId,
-               nsIDOMEventTarget* aEventTarget,
+                                      nsIDOMEventTarget* aEventTarget,
-               nsIPresentationServiceCallback* aCallback,
+                                      nsIPresentationServiceCallback* aCallback)
-               nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
   : mRequestUrls(aUrls)
   , mId(aId)
   , mOrigin(aOrigin)
   , mWindowId(aWindowId)
   , mChromeEventHandler(do_GetWeakReference(aEventTarget))
   , mCallback(aCallback)
-  , mBuilderConstructor(aBuilderConstructor)
 {
   MOZ_ASSERT(!mRequestUrls.IsEmpty());
   MOZ_ASSERT(!mId.IsEmpty());
   MOZ_ASSERT(!mOrigin.IsEmpty());
   MOZ_ASSERT(mCallback);
-  MOZ_ASSERT(mBuilderConstructor);
 }
 
 NS_IMETHODIMP
@@ -247,7 +241,6 @@ PresentationDeviceRequest::CreateSessionInfo(
     return info->ReplyError(NS_ERROR_DOM_OPERATION_ERR);
   }
 
-  info->SetTransportBuilderConstructor(mBuilderConstructor);
   return NS_OK;
 }
 
@@ -649,15 +642,13 @@ PresentationService::IsAppInstalled(nsIURI* aUri)
 }
 
 NS_IMETHODIMP
-PresentationService::StartSession(
+PresentationService::StartSession(const nsTArray<nsString>& aUrls,
-               const nsTArray<nsString>& aUrls,
+                                  const nsAString& aSessionId,
-               const nsAString& aSessionId,
+                                  const nsAString& aOrigin,
-               const nsAString& aOrigin,
+                                  const nsAString& aDeviceId,
-               const nsAString& aDeviceId,
+                                  uint64_t aWindowId,
-               uint64_t aWindowId,
+                                  nsIDOMEventTarget* aEventTarget,
-               nsIDOMEventTarget* aEventTarget,
+                                  nsIPresentationServiceCallback* aCallback)
-               nsIPresentationServiceCallback* aCallback,
-               nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
 {
   PRES_DEBUG("%s:id[%s]\n", __func__, NS_ConvertUTF16toUTF8(aSessionId).get());
 
@@ -672,8 +663,7 @@ PresentationService::StartSession(
                                   aOrigin,
                                   aWindowId,
                                   aEventTarget,
-                                  aCallback,
+                                  aCallback);
-                                  aBuilderConstructor);
 
   if (aDeviceId.IsVoid()) {
     // Pop up a prompt and ask user to select a device.
@@ -955,6 +945,28 @@ PresentationService::UnregisterSessionListener(const nsAString& aSessionId,
   return NS_OK;
 }
 
+nsresult
+PresentationService::RegisterTransportBuilder(const nsAString& aSessionId,
+                                              uint8_t aRole,
+                                              nsIPresentationSessionTransportBuilder* aBuilder)
+{
+  PRES_DEBUG("%s:id[%s], role[%d]\n", __func__,
+             NS_ConvertUTF16toUTF8(aSessionId).get(), aRole);
+
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aBuilder);
+  MOZ_ASSERT(aRole == nsIPresentationService::ROLE_CONTROLLER ||
+             aRole == nsIPresentationService::ROLE_RECEIVER);
+
+  RefPtr<PresentationSessionInfo> info = GetSessionInfo(aSessionId, aRole);
+  if (NS_WARN_IF(!info)) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  info->SetBuilder(aBuilder);
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 PresentationService::RegisterRespondingListener(
   uint64_t aWindowId,
@@ -997,11 +1009,9 @@ PresentationService::UnregisterRespondingListener(uint64_t aWindowId)
 }
 
 NS_IMETHODIMP
-PresentationService::NotifyReceiverReady(
+PresentationService::NotifyReceiverReady(const nsAString& aSessionId,
-               const nsAString& aSessionId,
+                                         uint64_t aWindowId,
-               uint64_t aWindowId,
+                                         bool aIsLoading)
-               bool aIsLoading,
-               nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
 {
   PRES_DEBUG("%s:id[%s], windowId[%lld], loading[%d]\n", __func__,
              NS_ConvertUTF16toUTF8(aSessionId).get(), aWindowId, aIsLoading);
@@ -1029,7 +1039,6 @@ PresentationService::NotifyReceiverReady(
     }
   }
 
-  info->SetTransportBuilderConstructor(aBuilderConstructor);
   return static_cast<PresentationPresentingInfo*>(info.get())->NotifyResponderReady();
 }
 

dom/presentation/PresentationService.h

@@ -56,6 +56,10 @@ public:
                            const uint8_t aRole,
                            base::ProcessId aProcessId);
 
+  nsresult RegisterTransportBuilder(const nsAString& aSessionId,
+                                    uint8_t aRole,
+                                    nsIPresentationSessionTransportBuilder* aBuilder);
+
 private:
   friend class PresentationDeviceRequest;
 

dom/presentation/PresentationSessionInfo.cpp

@@ -241,7 +241,7 @@ PresentationSessionInfo::Shutdown(nsresult aReason)
   mIsResponderReady = false;
   mIsOnTerminating = false;
 
-  ResetBuilder();
+  SetBuilder(nullptr);
 }
 
 nsresult
@@ -379,12 +379,7 @@ PresentationSessionInfo::GetWindow()
     return nullptr;
   }
 
-  auto window = nsGlobalWindow::GetInnerWindowWithId(windowId);
+  return nsGlobalWindow::GetInnerWindowWithId(windowId)->AsInner();
-  if (!window) {
-    return nullptr;
-  }
-
-  return window->AsInner();
 }
 
 /* virtual */ bool
@@ -497,7 +492,7 @@ PresentationSessionInfo::OnSessionTransport(nsIPresentationSessionTransport* tra
   PRES_DEBUG("%s:id[%s], role[%d], state[%d]\n", __func__,
              NS_ConvertUTF16toUTF8(mSessionId).get(), mRole, mState);
 
-  ResetBuilder();
+  SetBuilder(nullptr);
 
   if (mState != nsIPresentationSessionListener::STATE_CONNECTING) {
     return NS_ERROR_FAILURE;
@@ -528,7 +523,7 @@ PresentationSessionInfo::OnError(nsresult aReason)
   PRES_DEBUG("%s:id[%s], reason[%x], role[%d]\n", __func__,
              NS_ConvertUTF16toUTF8(mSessionId).get(), aReason, mRole);
 
-  ResetBuilder();
+  SetBuilder(nullptr);
   return ReplyError(aReason);
 }
 
@@ -832,44 +827,45 @@ PresentationControllingInfo::BuildTransport()
     return NS_OK;
   }
 
-  if (NS_WARN_IF(!mBuilderConstructor)) {
-    return NS_ERROR_NOT_AVAILABLE;
-  }
-
   if (!Preferences::GetBool("dom.presentation.session_transport.data_channel.enable")) {
     // Build TCP session transport
     return GetAddress();
   }
+
+  nsPIDOMWindowInner* window = nullptr;
   /**
    * Generally transport is maintained by the chrome process. However, data
    * channel should be live with the DOM , which implies RTCDataChannel in an OOP
    * page should be establish in the content process.
    *
-   * |mBuilderConstructor| is responsible for creating a builder, which is for
+   * In OOP data channel transport case, |mBuilder| is hooked when the content
-   * building a data channel transport.
+   * process is ready to build a data channel transport, trigger by:
+   * 1. PresentationIPCService::StartSession (sender)
+   * 2. PresentationIPCService::NotifyReceiverReady (receiver).
    *
-   * In the OOP case, |mBuilderConstructor| would create a builder which is
+   * In this case, |mBuilder| would be an object of |PresentationBuilderParent|
-   * an object of |PresentationBuilderParent|. So, |BuildDataChannelTransport|
+   * and set previously. Therefore, |BuildDataChannelTransport| triggers an IPC
-   * triggers an IPC call to make content process establish a RTCDataChannel
+   * call to make content process establish a RTCDataChannel transport.
-   * transport.
    */
-
+  // in-process case
-  mTransportType = nsIPresentationChannelDescription::TYPE_DATACHANNEL;
+  if (!mBuilder) {
-  if (NS_WARN_IF(NS_FAILED(
+    nsCOMPtr<nsIPresentationDataChannelSessionTransportBuilder> builder =
-    mBuilderConstructor->CreateTransportBuilder(mTransportType,
+      do_CreateInstance("@mozilla.org/presentation/datachanneltransportbuilder;1");
-                                                getter_AddRefs(mBuilder))))) {
+    if (NS_WARN_IF(!builder)) {
-    return NS_ERROR_NOT_AVAILABLE;
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+    SetBuilder(builder);
+    // OOP window would be set from content process
+    window = GetWindow();
   }
+  // OOP case
+  mTransportType = nsIPresentationChannelDescription::TYPE_DATACHANNEL;
 
   nsCOMPtr<nsIPresentationDataChannelSessionTransportBuilder>
     dataChannelBuilder(do_QueryInterface(mBuilder));
   if (NS_WARN_IF(!dataChannelBuilder)) {
     return NS_ERROR_NOT_AVAILABLE;
   }
-
-  // OOP window would be set from content process
-  nsPIDOMWindowInner* window = GetWindow();
-
   nsresult rv = dataChannelBuilder->
          BuildDataChannelTransport(nsIPresentationService::ROLE_CONTROLLER,
                                    window,
@@ -877,7 +873,6 @@ PresentationControllingInfo::BuildTransport()
   if (NS_WARN_IF(NS_FAILED(rv))) {
     return rv;
   }
-
   return NS_OK;
 }
 
@@ -928,18 +923,9 @@ PresentationControllingInfo::OnSocketAccepted(nsIServerSocket* aServerSocket,
 
   MOZ_ASSERT(NS_IsMainThread());
 
-  if (NS_WARN_IF(!mBuilderConstructor)) {
-    return ReplyError(NS_ERROR_DOM_OPERATION_ERR);
-  }
-
   // Initialize session transport builder and use |this| as the callback.
-  nsCOMPtr<nsIPresentationTCPSessionTransportBuilder> builder;
+  nsCOMPtr<nsIPresentationTCPSessionTransportBuilder> builder =
-  if (NS_SUCCEEDED(mBuilderConstructor->CreateTransportBuilder(
+    do_CreateInstance(PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID);
-                     nsIPresentationChannelDescription::TYPE_TCP,
-                     getter_AddRefs(mBuilder)))) {
-    builder = do_QueryInterface(mBuilder);
-  }
-
   if (NS_WARN_IF(!builder)) {
     return ReplyError(NS_ERROR_DOM_OPERATION_ERR);
   }
@@ -1149,7 +1135,6 @@ PresentationPresentingInfo::Shutdown(nsresult aReason)
   mRequesterDescription = nullptr;
   mPendingCandidates.Clear();
   mPromise = nullptr;
-  mHasFlushPendingEvents = false;
 }
 
 // nsIPresentationSessionTransportBuilderListener
@@ -1227,25 +1212,16 @@ PresentationPresentingInfo::InitTransportAndSendAnswer()
     return rv;
   }
 
-  if (NS_WARN_IF(!mBuilderConstructor)) {
-    return ReplyError(NS_ERROR_DOM_OPERATION_ERR);
-  }
-
-  if (NS_WARN_IF(NS_FAILED(
-    mBuilderConstructor->CreateTransportBuilder(type,
-                                                getter_AddRefs(mBuilder))))) {
-    return NS_ERROR_NOT_AVAILABLE;
-  }
-
   if (type == nsIPresentationChannelDescription::TYPE_TCP) {
     // Establish a data transport channel |mTransport| to the sender and use
     // |this| as the callback.
     nsCOMPtr<nsIPresentationTCPSessionTransportBuilder> builder =
-      do_QueryInterface(mBuilder);
+      do_CreateInstance(PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID);
     if (NS_WARN_IF(!builder)) {
       return NS_ERROR_NOT_AVAILABLE;
     }
 
+    SetBuilder(builder);
     mTransportType = nsIPresentationChannelDescription::TYPE_TCP;
     return builder->BuildTCPReceiverTransport(mRequesterDescription, this);
   }
@@ -1254,30 +1230,43 @@ PresentationPresentingInfo::InitTransportAndSendAnswer()
     if (!Preferences::GetBool("dom.presentation.session_transport.data_channel.enable")) {
       return NS_ERROR_NOT_IMPLEMENTED;
     }
+    nsPIDOMWindowInner* window = nullptr;
+
     /**
      * Generally transport is maintained by the chrome process. However, data
      * channel should be live with the DOM , which implies RTCDataChannel in an OOP
      * page should be establish in the content process.
      *
-     * |mBuilderConstructor| is responsible for creating a builder, which is for
+     * In OOP data channel transport case, |mBuilder| is hooked when the content
-     * building a data channel transport.
+     * process is ready to build a data channel transport, trigger by:
+     * 1. PresentationIPCService::StartSession (sender)
+     * 2. PresentationIPCService::NotifyReceiverReady (receiver).
      *
-     * In the OOP case, |mBuilderConstructor| would create a builder which is
+     * In this case, |mBuilder| would be an object of |PresentationBuilderParent|
-     * an object of |PresentationBuilderParent|. So, |BuildDataChannelTransport|
+     * and set previously. Therefore, |BuildDataChannelTransport| triggers an IPC
-     * triggers an IPC call to make content process establish a RTCDataChannel
+     * call to make content process establish a RTCDataChannel transport.
-     * transport.
      */
+    // in-process case
+    if (!mBuilder) {
+      nsCOMPtr<nsIPresentationDataChannelSessionTransportBuilder> builder =
+        do_CreateInstance("@mozilla.org/presentation/datachanneltransportbuilder;1");
 
+      if (NS_WARN_IF(!builder)) {
+        return NS_ERROR_NOT_AVAILABLE;
+      }
+
+      SetBuilder(builder);
+
+      // OOP window would be set from content process
+      window = GetWindow();
+    }
     mTransportType = nsIPresentationChannelDescription::TYPE_DATACHANNEL;
 
-    nsCOMPtr<nsIPresentationDataChannelSessionTransportBuilder> dataChannelBuilder =
+    nsCOMPtr<nsIPresentationDataChannelSessionTransportBuilder>
-      do_QueryInterface(mBuilder);
+      dataChannelBuilder(do_QueryInterface(mBuilder));
     if (NS_WARN_IF(!dataChannelBuilder)) {
       return NS_ERROR_NOT_AVAILABLE;
     }
-
-    nsPIDOMWindowInner* window = GetWindow();
-
     rv = dataChannelBuilder->
            BuildDataChannelTransport(nsIPresentationService::ROLE_RECEIVER,
                                      window,
@@ -1286,11 +1275,11 @@ PresentationPresentingInfo::InitTransportAndSendAnswer()
       return rv;
     }
 
-    rv = FlushPendingEvents(dataChannelBuilder);
+
+    rv = this->FlushPendingEvents(dataChannelBuilder);
     if (NS_WARN_IF(NS_FAILED(rv))) {
       return rv;
     }
-
     return NS_OK;
   }
 

dom/presentation/PresentationSessionInfo.h

@@ -79,6 +79,11 @@ public:
     mDevice = aDevice;
   }
 
+  void SetBuilder(nsIPresentationSessionTransportBuilder* aBuilder)
+  {
+    mBuilder = aBuilder;
+  }
+
   already_AddRefed<nsIPresentationDevice> GetDevice() const
   {
     nsCOMPtr<nsIPresentationDevice> device = mDevice;
@@ -108,12 +113,6 @@ public:
 
   virtual bool IsAccessible(base::ProcessId aProcessId);
 
-  void SetTransportBuilderConstructor(
-    nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
-  {
-    mBuilderConstructor = aBuilderConstructor;
-  }
-
 protected:
   virtual ~PresentationSessionInfo()
   {
@@ -150,11 +149,6 @@ protected:
 
   void ContinueTermination();
 
-  void ResetBuilder()
-  {
-    mBuilder = nullptr;
-  }
-
   // Should be nsIPresentationChannelDescription::TYPE_TCP/TYPE_DATACHANNEL
   uint8_t mTransportType = 0;
 
@@ -175,7 +169,6 @@ protected:
   nsCOMPtr<nsIPresentationSessionTransport> mTransport;
   nsCOMPtr<nsIPresentationControlChannel> mControlChannel;
   nsCOMPtr<nsIPresentationSessionTransportBuilder> mBuilder;
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> mBuilderConstructor;
 };
 
 // Session info with controlling browsing context (sender side) behaviors.

dom/presentation/PresentationTransportBuilderConstructor.cpp

@@ -1,85 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "PresentationTransportBuilderConstructor.h"
-
-#include "nsComponentManagerUtils.h"
-#include "nsIPresentationControlChannel.h"
-#include "nsIPresentationSessionTransport.h"
-#include "nsXULAppAPI.h"
-
-namespace mozilla {
-namespace dom {
-
-NS_IMPL_ISUPPORTS(DummyPresentationTransportBuilderConstructor,
-                  nsIPresentationTransportBuilderConstructor)
-
-NS_IMETHODIMP
-DummyPresentationTransportBuilderConstructor::CreateTransportBuilder(
-                              uint8_t aType,
-                              nsIPresentationSessionTransportBuilder** aRetval)
-{
-  MOZ_ASSERT(false, "Unexpected to be invoked.");
-  return NS_OK;
-}
-
-NS_IMPL_ISUPPORTS_INHERITED0(PresentationTransportBuilderConstructor,
-                             DummyPresentationTransportBuilderConstructor)
-
-/* static */ already_AddRefed<nsIPresentationTransportBuilderConstructor>
-PresentationTransportBuilderConstructor::Create()
-{
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor;
-  if (XRE_IsContentProcess()) {
-    constructor = new DummyPresentationTransportBuilderConstructor();
-  } else {
-    constructor = new PresentationTransportBuilderConstructor();
-  }
-
-  return constructor.forget();
-}
-
-NS_IMETHODIMP
-PresentationTransportBuilderConstructor::CreateTransportBuilder(
-                              uint8_t aType,
-                              nsIPresentationSessionTransportBuilder** aRetval)
-{
-  if (NS_WARN_IF(!aRetval)) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  *aRetval = nullptr;
-
-  if (NS_WARN_IF(aType != nsIPresentationChannelDescription::TYPE_TCP &&
-                 aType != nsIPresentationChannelDescription::TYPE_DATACHANNEL)) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  if (XRE_IsContentProcess()) {
-    MOZ_ASSERT(false,
-               "CreateTransportBuilder can only be invoked in parent process.");
-    return NS_ERROR_FAILURE;
-  }
-
-  nsCOMPtr<nsIPresentationSessionTransportBuilder> builder;
-  if (aType == nsIPresentationChannelDescription::TYPE_TCP) {
-    builder =
-      do_CreateInstance(PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID);
-  } else {
-    builder =
-      do_CreateInstance("@mozilla.org/presentation/datachanneltransportbuilder;1");
-  }
-
-  if (NS_WARN_IF(!builder)) {
-    return NS_ERROR_DOM_OPERATION_ERR;
-  }
-
-  builder.forget(aRetval);
-  return NS_OK;
-}
-
-} // namespace dom
-} // namespace mozilla

dom/presentation/PresentationTransportBuilderConstructor.h

@@ -1,48 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef mozilla_dom_PresentationTransportBuilderConstructor_h
-#define mozilla_dom_PresentationTransportBuilderConstructor_h
-
-#include "nsCOMPtr.h"
-#include "nsIPresentationSessionTransportBuilder.h"
-#include "nsISupportsImpl.h"
-
-namespace mozilla {
-namespace dom {
-
-class DummyPresentationTransportBuilderConstructor :
-  public nsIPresentationTransportBuilderConstructor
-{
-public:
-  NS_DECL_ISUPPORTS
-  NS_DECL_NSIPRESENTATIONTRANSPORTBUILDERCONSTRUCTOR
-
-  DummyPresentationTransportBuilderConstructor() = default;
-
-protected:
-  virtual ~DummyPresentationTransportBuilderConstructor() = default;
-};
-
-class PresentationTransportBuilderConstructor final :
-  public DummyPresentationTransportBuilderConstructor
-{
-public:
-  NS_DECL_ISUPPORTS_INHERITED
-  NS_DECL_NSIPRESENTATIONTRANSPORTBUILDERCONSTRUCTOR
-
-  static already_AddRefed<nsIPresentationTransportBuilderConstructor>
-  Create();
-
-private:
-  PresentationTransportBuilderConstructor() = default;
-  virtual ~PresentationTransportBuilderConstructor() = default;
-};
-
-} // namespace dom
-} // namespace mozilla
-
-#endif // mozilla_dom_PresentationTransportBuilderConstructor_h

dom/presentation/interfaces/nsIPresentationService.idl

@@ -9,7 +9,6 @@ interface nsIInputStream;
 interface nsIPresentationAvailabilityListener;
 interface nsIPresentationRespondingListener;
 interface nsIPresentationSessionListener;
-interface nsIPresentationTransportBuilderConstructor;
 
 %{C++
 #define PRESENTATION_SERVICE_CID \
@@ -73,7 +72,6 @@ interface nsIPresentationService : nsISupports
    *                  NotifySuccess() is called with |id| if a session is
    *                  established successfully with the selected device.
    *                  Otherwise, NotifyError() is called with a error message.
-   * @param constructor: The constructor for creating a transport builder.
    */
   [noscript] void startSession(in URLArrayRef urls,
                                in DOMString sessionId,
@@ -81,8 +79,7 @@ interface nsIPresentationService : nsISupports
                                in DOMString deviceId,
                                in unsigned long long windowId,
                                in nsIDOMEventTarget eventTarget,
-                               in nsIPresentationServiceCallback callback,
+                               in nsIPresentationServiceCallback callback);
-                               in nsIPresentationTransportBuilderConstructor constructor);
 
   /*
    * Send the message to the session.
@@ -184,12 +181,10 @@ interface nsIPresentationService : nsISupports
    * @param windowId  The inner window ID associated with the presentation
    *                  session.
    * @param isLoading true if receiver page is loading successfully.
-   * @param constructor: The constructor for creating a transport builder.
    */
   void notifyReceiverReady(in DOMString sessionId,
                            in unsigned long long windowId,
-                           in boolean isLoading,
+                           in boolean isLoading);
-                           in nsIPresentationTransportBuilderConstructor constructor);
 
   /*
    * Notify the transport is closed

dom/presentation/interfaces/nsIPresentationSessionTransportBuilder.idl

@@ -28,15 +28,6 @@ interface nsIPresentationSessionTransportBuilder : nsISupports
 {
 };
 
-/**
- * The constructor for creating a transport builder.
- */
-[scriptable, uuid(706482b2-1b51-4bed-a21d-785a9cfcfac7)]
-interface nsIPresentationTransportBuilderConstructor : nsISupports
-{
-  nsIPresentationSessionTransportBuilder createTransportBuilder(in uint8_t type);
-};
-
 /**
  * Builder for TCP session transport
  */

dom/presentation/ipc/PresentationIPCService.cpp

@@ -54,15 +54,13 @@ PresentationIPCService::~PresentationIPCService()
 }
 
 NS_IMETHODIMP
-PresentationIPCService::StartSession(
+PresentationIPCService::StartSession(const nsTArray<nsString>& aUrls,
-               const nsTArray<nsString>& aUrls,
+                                     const nsAString& aSessionId,
-               const nsAString& aSessionId,
+                                     const nsAString& aOrigin,
-               const nsAString& aOrigin,
+                                     const nsAString& aDeviceId,
-               const nsAString& aDeviceId,
+                                     uint64_t aWindowId,
-               uint64_t aWindowId,
+                                     nsIDOMEventTarget* aEventTarget,
-               nsIDOMEventTarget* aEventTarget,
+                                     nsIPresentationServiceCallback* aCallback)
-               nsIPresentationServiceCallback* aCallback,
-               nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
 {
   if (aWindowId != 0) {
     AddRespondingSessionId(aWindowId,
@@ -380,11 +378,9 @@ PresentationIPCService::NotifyAvailableChange(bool aAvailable)
 }
 
 NS_IMETHODIMP
-PresentationIPCService::NotifyReceiverReady(
+PresentationIPCService::NotifyReceiverReady(const nsAString& aSessionId,
-               const nsAString& aSessionId,
+                                            uint64_t aWindowId,
-               uint64_t aWindowId,
+                                            bool aIsLoading)
-               bool aIsLoading,
-               nsIPresentationTransportBuilderConstructor* aBuilderConstructor)
 {
   MOZ_ASSERT(NS_IsMainThread());
 

dom/presentation/ipc/PresentationParent.cpp

@@ -9,78 +9,13 @@
 #include "mozilla/ipc/InputStreamUtils.h"
 #include "mozilla/Unused.h"
 #include "nsIPresentationDeviceManager.h"
-#include "nsIPresentationSessionTransport.h"
-#include "nsIPresentationSessionTransportBuilder.h"
 #include "nsServiceManagerUtils.h"
 #include "PresentationBuilderParent.h"
 #include "PresentationParent.h"
 #include "PresentationService.h"
 #include "PresentationSessionInfo.h"
 
-namespace mozilla {
+using namespace mozilla::dom;
-namespace dom {
-
-namespace {
-
-class PresentationTransportBuilderConstructorIPC final :
-  public nsIPresentationTransportBuilderConstructor
-{
-public:
-  NS_DECL_ISUPPORTS
-  NS_DECL_NSIPRESENTATIONTRANSPORTBUILDERCONSTRUCTOR
-
-  PresentationTransportBuilderConstructorIPC(PresentationParent* aParent)
-    : mParent(aParent)
-  {
-  }
-
-private:
-  virtual ~PresentationTransportBuilderConstructorIPC() = default;
-
-  RefPtr<PresentationParent> mParent;
-};
-
-NS_IMPL_ISUPPORTS(PresentationTransportBuilderConstructorIPC,
-                  nsIPresentationTransportBuilderConstructor)
-
-NS_IMETHODIMP
-PresentationTransportBuilderConstructorIPC::CreateTransportBuilder(
-                              uint8_t aType,
-                              nsIPresentationSessionTransportBuilder** aRetval)
-{
-  if (NS_WARN_IF(!aRetval)) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  *aRetval = nullptr;
-
-  if (NS_WARN_IF(aType != nsIPresentationChannelDescription::TYPE_TCP &&
-                 aType != nsIPresentationChannelDescription::TYPE_DATACHANNEL)) {
-    return NS_ERROR_INVALID_ARG;
-  }
-
-  if (XRE_IsContentProcess()) {
-    MOZ_ASSERT(false,
-               "CreateTransportBuilder can only be invoked in parent process.");
-    return NS_ERROR_FAILURE;
-  }
-
-  nsCOMPtr<nsIPresentationSessionTransportBuilder> builder;
-  if (aType == nsIPresentationChannelDescription::TYPE_TCP) {
-    builder = do_CreateInstance(PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID);
-  } else {
-    builder = new PresentationBuilderParent(mParent);
-  }
-
-  if (NS_WARN_IF(!builder)) {
-    return NS_ERROR_DOM_OPERATION_ERR;
-  }
-
-  builder.forget(aRetval);
-  return NS_OK;
-}
-
-} // anonymous namespace
 
 /*
  * Implementation of PresentationParent
@@ -282,6 +217,19 @@ PresentationParent::RecvUnregisterRespondingHandler(const uint64_t& aWindowId)
   return true;
 }
 
+bool
+PresentationParent::RegisterTransportBuilder(const nsString& aSessionId,
+                                             const uint8_t& aRole)
+{
+  MOZ_ASSERT(mService);
+
+  nsCOMPtr<nsIPresentationSessionTransportBuilder> builder =
+    new PresentationBuilderParent(this);
+  Unused << NS_WARN_IF(NS_FAILED(static_cast<PresentationService*>(mService.get())->
+                         RegisterTransportBuilder(aSessionId, aRole, builder)));
+  return true;
+}
+
 NS_IMETHODIMP
 PresentationParent::NotifyAvailableChange(bool aAvailable)
 {
@@ -342,12 +290,10 @@ PresentationParent::RecvNotifyReceiverReady(const nsString& aSessionId,
 {
   MOZ_ASSERT(mService);
 
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor =
+  RegisterTransportBuilder(aSessionId, nsIPresentationService::ROLE_RECEIVER);
-    new PresentationTransportBuilderConstructorIPC(this);
   Unused << NS_WARN_IF(NS_FAILED(mService->NotifyReceiverReady(aSessionId,
                                                                aWindowId,
-                                                               aIsLoading,
+                                                               aIsLoading)));
-                                                               constructor)));
   return true;
 }
 
@@ -392,7 +338,7 @@ nsresult
 PresentationRequestParent::DoRequest(const StartSessionRequest& aRequest)
 {
   MOZ_ASSERT(mService);
-
+  mNeedRegisterBuilder = true;
   mSessionId = aRequest.sessionId();
 
   nsCOMPtr<nsIDOMEventTarget> eventTarget;
@@ -402,13 +348,10 @@ PresentationRequestParent::DoRequest(const StartSessionRequest& aRequest)
   if (tp) {
     eventTarget = do_QueryInterface(tp->GetOwnerElement());
   }
-
+  
-  RefPtr<PresentationParent> parent = static_cast<PresentationParent*>(Manager());
-  nsCOMPtr<nsIPresentationTransportBuilderConstructor> constructor =
-    new PresentationTransportBuilderConstructorIPC(parent);
   return mService->StartSession(aRequest.urls(), aRequest.sessionId(),
                                 aRequest.origin(), aRequest.deviceId(),
-                                aRequest.windowId(), eventTarget, this, constructor);
+                                aRequest.windowId(), eventTarget, this);
 }
 
 nsresult
@@ -487,6 +430,7 @@ PresentationRequestParent::DoRequest(const ReconnectSessionRequest& aRequest)
     return SendResponse(NS_ERROR_DOM_NOT_FOUND_ERR);
   }
 
+  mNeedRegisterBuilder = true;
   mSessionId = aRequest.sessionId();
   return mService->ReconnectSession(aRequest.urls(),
                                     aRequest.sessionId(),
@@ -516,6 +460,13 @@ PresentationRequestParent::DoRequest(const BuildTransportRequest& aRequest)
 NS_IMETHODIMP
 PresentationRequestParent::NotifySuccess(const nsAString& aUrl)
 {
+  if (mNeedRegisterBuilder) {
+    RefPtr<PresentationParent> parent = static_cast<PresentationParent*>(Manager());
+    Unused << NS_WARN_IF(!parent->RegisterTransportBuilder(
+                                      mSessionId,
+                                      nsIPresentationService::ROLE_CONTROLLER));
+  }
+
   Unused << SendNotifyRequestUrlSelected(nsString(aUrl));
   return SendResponse(NS_OK);
 }
@@ -535,6 +486,3 @@ PresentationRequestParent::SendResponse(nsresult aResult)
 
   return NS_OK;
 }
-
-} // namespace dom
-} // namespace mozilla

dom/presentation/moz.build

@@ -55,7 +55,6 @@ UNIFIED_SOURCES += [
     'PresentationSessionRequest.cpp',
     'PresentationTCPSessionTransport.cpp',
     'PresentationTerminateRequest.cpp',
-    'PresentationTransportBuilderConstructor.cpp'
 ]
 
 EXTRA_COMPONENTS += [

dom/presentation/tests/mochitest/PresentationSessionChromeScript.js

@@ -220,7 +220,6 @@ const mockedDevicePrompt = {
 
 const mockedSessionTransport = {
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationSessionTransport,
-                                         Ci.nsIPresentationSessionTransportBuilder,
                                          Ci.nsIPresentationTCPSessionTransportBuilder,
                                          Ci.nsIPresentationDataChannelSessionTransportBuilder,
                                          Ci.nsIPresentationControlChannelListener,