Bug 1147911 Part 7: Create browsing context with no opener if URI needs different process. r=smaug

This also means window.open returns null in the same circumstance.
2016-11-24 15:08:31 +00:00 · 2016-11-24 15:08:31 +00:00 · f5830d5e44
--- a/browser/base/content/tab-content.js
+++ b/browser/base/content/tab-content.js
@ -622,6 +622,10 @@ var WebBrowserChrome = {
    return true;
  },

+  shouldLoadURIInThisProcess: function(aURI) {
+    return E10SUtils.shouldLoadURIInThisProcess(aURI);
+  },
+
  // Try to reload the currently active or currently loading page in a new process.
  reloadInFreshProcess: function(aDocShell, aURI, aReferrer) {
    E10SUtils.redirectLoad(aDocShell, aURI, aReferrer, true);
--- a/dom/base/nsFrameLoader.h
+++ b/dom/base/nsFrameLoader.h
@ -47,12 +47,13 @@ class PBrowserParent;
 class Promise;
 class TabParent;
 class MutableTabContext;
-} // namespace dom

 namespace ipc {
 class StructuredCloneData;
 } // namespace ipc

+} // namespace dom
+
 namespace layout {
 class RenderFrameParent;
 } // namespace layout
--- a/dom/ipc/ContentChild.cpp
+++ b/dom/ipc/ContentChild.cpp
@ -655,6 +655,43 @@ ContentChild::ProvideWindow(mozIDOMWindowProxy* aParent,
                             aForceNoOpener, aWindowIsNew, aReturn);
 }

+static nsresult
+GetWindowParamsFromParent(mozIDOMWindowProxy* aParent,
+                          nsACString& aBaseURIString, float* aFullZoom,
+                          DocShellOriginAttributes& aOriginAttributes)
+{
+  *aFullZoom = 1.0f;
+  auto* opener = nsPIDOMWindowOuter::From(aParent);
+  if (!opener) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIDocument> doc = opener->GetDoc();
+  nsCOMPtr<nsIURI> baseURI = doc->GetDocBaseURI();
+  if (!baseURI) {
+    NS_ERROR("nsIDocument didn't return a base URI");
+    return NS_ERROR_FAILURE;
+  }
+
+  baseURI->GetSpec(aBaseURIString);
+
+  RefPtr<nsDocShell> openerDocShell =
+    static_cast<nsDocShell*>(opener->GetDocShell());
+  if (!openerDocShell) {
+    return NS_OK;
+  }
+
+  aOriginAttributes = openerDocShell->GetOriginAttributes();
+
+  nsCOMPtr<nsIContentViewer> cv;
+  nsresult rv = openerDocShell->GetContentViewer(getter_AddRefs(cv));
+  if (NS_SUCCEEDED(rv) && cv) {
+    cv->GetFullZoom(aFullZoom);
+  }
+
+  return NS_OK;
+}
+
 nsresult
 ContentChild::ProvideWindowCommon(TabChild* aTabOpener,
                                  mozIDOMWindowProxy* aParent,
@ -674,8 +711,43 @@ ContentChild::ProvideWindowCommon(TabChild* aTabOpener,

  nsAutoPtr<IPCTabContext> ipcContext;
  TabId openerTabId = TabId(0);
+  nsAutoCString features(aFeatures);

+  nsresult rv;
  if (aTabOpener) {
+    // Check to see if the target URI can be loaded in this process.
+    // If not create and load it in an unrelated tab/window.
+    nsCOMPtr<nsIWebBrowserChrome3> browserChrome3;
+    rv = aTabOpener->GetWebBrowserChrome(getter_AddRefs(browserChrome3));
+    if (NS_SUCCEEDED(rv) && browserChrome3) {
+      bool shouldLoad;
+      rv = browserChrome3->ShouldLoadURIInThisProcess(aURI, &shouldLoad);
+      if (NS_SUCCEEDED(rv) && !shouldLoad) {
+        nsAutoCString baseURIString;
+        float fullZoom;
+        DocShellOriginAttributes originAttributes;
+        rv = GetWindowParamsFromParent(aParent, baseURIString, &fullZoom,
+                                       originAttributes);
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          return rv;
+        }
+
+        URIParams uriToLoad;
+        SerializeURI(aURI, uriToLoad);
+        Unused << SendCreateWindowInDifferentProcess(aTabOpener, aChromeFlags,
+                                                     aCalledFromJS,
+                                                     aPositionSpecified,
+                                                     aSizeSpecified,
+                                                     uriToLoad, features,
+                                                     baseURIString,
+                                                     originAttributes, fullZoom);
+
+        // We return NS_ERROR_ABORT, so that the caller knows that we've abandoned
+        // the window open as far as it is concerned.
+        return NS_ERROR_ABORT;
+      }
+    }
+
    PopupIPCTabContext context;
    openerTabId = aTabOpener->GetTabId();
    context.opener() = openerTabId;
@ -714,7 +786,6 @@ ContentChild::ProvideWindowCommon(TabChild* aTabOpener,
    GetID(), IsForBrowser());

  nsString name(aName);
-  nsAutoCString features(aFeatures);
  nsTArray<FrameScriptInfo> frameScripts;
  nsCString urlToLoad;

@ -740,40 +811,20 @@ ContentChild::ProvideWindowCommon(TabChild* aTabOpener,
                                         &layersId);
  } else {
    nsAutoCString baseURIString;
-    if (aTabOpener) {
-      auto* opener = nsPIDOMWindowOuter::From(aParent);
-      nsCOMPtr<nsIDocument> doc = opener->GetDoc();
-      nsCOMPtr<nsIURI> baseURI = doc->GetDocBaseURI();
-      if (!baseURI) {
-        NS_ERROR("nsIDocument didn't return a base URI");
-        return NS_ERROR_FAILURE;
-      }
-
-      baseURI->GetSpec(baseURIString);
+    float fullZoom;
+    DocShellOriginAttributes originAttributes;
+    rv = GetWindowParamsFromParent(aParent, baseURIString, &fullZoom,
+                                   originAttributes);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return rv;
    }

-    auto* opener = nsPIDOMWindowOuter::From(aParent);
-    nsIDocShell* openerShell;
-    RefPtr<nsDocShell> openerDocShell;
-    float fullZoom = 1.0f;
-    if (opener && (openerShell = opener->GetDocShell())) {
-      openerDocShell = static_cast<nsDocShell*>(openerShell);
-      nsCOMPtr<nsIContentViewer> cv;
-      openerDocShell->GetContentViewer(getter_AddRefs(cv));
-      if (cv) {
-        cv->GetFullZoom(&fullZoom);
-      }
-    }
-
-    nsresult rv;
    if (!SendCreateWindow(aTabOpener, newChild, renderFrame,
                          aChromeFlags, aCalledFromJS, aPositionSpecified,
                          aSizeSpecified,
                          features,
                          baseURIString,
-                          openerDocShell
-                            ? openerDocShell->GetOriginAttributes()
-                            : DocShellOriginAttributes(),
+                          originAttributes,
                          fullZoom,
                          &rv,
                          aWindowIsNew,
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@ -107,6 +107,7 @@
 #include "nsConsoleService.h"
 #include "nsContentUtils.h"
 #include "nsDebugImpl.h"
+#include "nsFrameLoader.h"
 #include "nsFrameMessageManager.h"
 #include "nsHashPropertyBag.h"
 #include "nsIAlertsService.h"
@ -4157,6 +4158,130 @@ ContentParent::DeallocPWebBrowserPersistDocumentParent(PWebBrowserPersistDocumen
  return true;
 }

+mozilla::ipc::IPCResult
+ContentParent::CommonCreateWindow(PBrowserParent* aThisTab,
+                                  bool aSetOpener,
+                                  const uint32_t& aChromeFlags,
+                                  const bool& aCalledFromJS,
+                                  const bool& aPositionSpecified,
+                                  const bool& aSizeSpecified,
+                                  nsIURI* aURIToLoad,
+                                  const nsCString& aFeatures,
+                                  const nsCString& aBaseURI,
+                                  const DocShellOriginAttributes& aOpenerOriginAttributes,
+                                  const float& aFullZoom,
+                                  nsresult& aResult,
+                                  nsCOMPtr<nsITabParent>& aNewTabParent,
+                                  bool* aWindowIsNew)
+
+{
+  // The content process should never be in charge of computing whether or
+  // not a window should be private or remote - the parent will do that.
+  const uint32_t badFlags = nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW |
+                            nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW |
+                            nsIWebBrowserChrome::CHROME_PRIVATE_LIFETIME |
+                            nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
+  if (!!(aChromeFlags & badFlags)) {
+    return IPC_FAIL(this, "Forbidden aChromeFlags passed");
+  }
+
+  TabParent* thisTabParent = TabParent::GetFrom(aThisTab);
+  nsCOMPtr<nsIContent> frame;
+  if (thisTabParent) {
+    frame = do_QueryInterface(thisTabParent->GetOwnerElement());
+
+    if (NS_WARN_IF(thisTabParent->IsMozBrowser())) {
+      return IPC_FAIL(this, "aThisTab is not a MozBrowser");
+    }
+  }
+
+  nsCOMPtr<nsPIDOMWindowOuter> outerWin;
+  if (frame) {
+    outerWin = frame->OwnerDoc()->GetWindow();
+
+    // If our chrome window is in the process of closing, don't try to open a
+    // new tab in it.
+    if (outerWin && outerWin->Closed()) {
+      outerWin = nullptr;
+    }
+  }
+
+  nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;
+  if (thisTabParent) {
+    browserDOMWin = thisTabParent->GetBrowserDOMWindow();
+  }
+
+  // If we haven't found a chrome window to open in, just use the most recently
+  // opened one.
+  if (!outerWin) {
+    outerWin = nsContentUtils::GetMostRecentNonPBWindow();
+    if (NS_WARN_IF(!outerWin)) {
+      aResult = NS_ERROR_FAILURE;
+      return IPC_OK();
+    }
+
+    nsCOMPtr<nsIDOMChromeWindow> rootChromeWin = do_QueryInterface(outerWin);
+    if (rootChromeWin) {
+      rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));
+    }
+  }
+
+  int32_t openLocation = nsWindowWatcher::GetWindowOpenLocation(
+    outerWin, aChromeFlags, aCalledFromJS, aPositionSpecified, aSizeSpecified);
+
+  MOZ_ASSERT(openLocation == nsIBrowserDOMWindow::OPEN_NEWTAB ||
+             openLocation == nsIBrowserDOMWindow::OPEN_NEWWINDOW);
+
+  if (openLocation == nsIBrowserDOMWindow::OPEN_NEWTAB) {
+    if (NS_WARN_IF(!browserDOMWin)) {
+      aResult = NS_ERROR_ABORT;
+      return IPC_OK();
+    }
+
+    bool isPrivate = false;
+    if (thisTabParent) {
+      nsCOMPtr<nsILoadContext> loadContext = thisTabParent->GetLoadContext();
+      loadContext->GetUsePrivateBrowsing(&isPrivate);
+    }
+
+    nsCOMPtr<nsIOpenURIInFrameParams> params =
+      new nsOpenURIInFrameParams(aOpenerOriginAttributes);
+    params->SetReferrer(NS_ConvertUTF8toUTF16(aBaseURI));
+    params->SetIsPrivate(isPrivate);
+
+    nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner;
+    aResult = browserDOMWin->OpenURIInFrame(aURIToLoad, params, openLocation,
+                                            nsIBrowserDOMWindow::OPEN_NEW,
+                                            getter_AddRefs(frameLoaderOwner));
+    if (NS_SUCCEEDED(aResult) && frameLoaderOwner) {
+      RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
+      if (frameLoader) {
+        frameLoader->GetTabParent(getter_AddRefs(aNewTabParent));
+      }
+    } else {
+      *aWindowIsNew = false;
+    }
+
+    return IPC_OK();
+  }
+
+  nsCOMPtr<nsPIWindowWatcher> pwwatch =
+    do_GetService(NS_WINDOWWATCHER_CONTRACTID, &aResult);
+  if (NS_WARN_IF(NS_FAILED(aResult))) {
+    return IPC_OK();
+  }
+
+  if (aSetOpener && thisTabParent) {
+    aResult = pwwatch->OpenWindowWithTabParent(thisTabParent, aFeatures,
+                                               aCalledFromJS, aFullZoom,
+                                               getter_AddRefs(aNewTabParent));
+  } else {
+    aResult = pwwatch->OpenWindowWithoutParent(getter_AddRefs(aNewTabParent));
+  }
+
+  return IPC_OK();
+}
+
 mozilla::ipc::IPCResult
 ContentParent::RecvCreateWindow(PBrowserParent* aThisTab,
                                PBrowserParent* aNewTab,
@ -4180,26 +4305,6 @@ ContentParent::RecvCreateWindow(PBrowserParent* aThisTab,
  *aWindowIsNew = true;
  *aResult = NS_OK;

-  // The content process should never be in charge of computing whether or
-  // not a window should be private or remote - the parent will do that.
-  const uint32_t badFlags =
-        nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW
-      | nsIWebBrowserChrome::CHROME_NON_PRIVATE_WINDOW
-      | nsIWebBrowserChrome::CHROME_PRIVATE_LIFETIME
-      | nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
-  if (!!(aChromeFlags & badFlags)) {
-      return IPC_FAIL_NO_REASON(this);
-  }
-
-  TabParent* thisTabParent = nullptr;
-  if (aThisTab) {
-    thisTabParent = TabParent::GetFrom(aThisTab);
-  }
-
-  if (NS_WARN_IF(thisTabParent && thisTabParent->IsMozBrowser())) {
-    return IPC_FAIL_NO_REASON(this);
-  }
-
  TabParent* newTab = TabParent::GetFrom(aNewTab);
  MOZ_ASSERT(newTab);

@ -4215,106 +4320,16 @@ ContentParent::RecvCreateWindow(PBrowserParent* aThisTab,
  // we must have an opener.
  newTab->SetHasContentOpener(true);

-  nsCOMPtr<nsIContent> frame;
-  if (thisTabParent) {
-    frame = do_QueryInterface(thisTabParent->GetOwnerElement());
-  }
-
-  nsCOMPtr<nsPIDOMWindowOuter> parent;
-  if (frame) {
-    parent = frame->OwnerDoc()->GetWindow();
-
-    // If our chrome window is in the process of closing, don't try to open a
-    // new tab in it.
-    if (parent && parent->Closed()) {
-      parent = nullptr;
-    }
-  }
-
-  nsCOMPtr<nsIBrowserDOMWindow> browserDOMWin;
-  if (thisTabParent) {
-    browserDOMWin = thisTabParent->GetBrowserDOMWindow();
-  }
-
-  // If we haven't found a chrome window to open in, just use the most recently
-  // opened one.
-  if (!parent) {
-    parent = nsContentUtils::GetMostRecentNonPBWindow();
-    if (NS_WARN_IF(!parent)) {
-      *aResult = NS_ERROR_FAILURE;
-      return IPC_OK();
-    }
-
-    nsCOMPtr<nsIDOMChromeWindow> rootChromeWin = do_QueryInterface(parent);
-    if (rootChromeWin) {
-      rootChromeWin->GetBrowserDOMWindow(getter_AddRefs(browserDOMWin));
-    }
-  }
-
-  int32_t openLocation =
-    nsWindowWatcher::GetWindowOpenLocation(parent, aChromeFlags, aCalledFromJS,
-                                           aPositionSpecified, aSizeSpecified);
-
-  MOZ_ASSERT(openLocation == nsIBrowserDOMWindow::OPEN_NEWTAB ||
-             openLocation == nsIBrowserDOMWindow::OPEN_NEWWINDOW);
-
-  // Opening new tabs is the easy case...
-  if (openLocation == nsIBrowserDOMWindow::OPEN_NEWTAB) {
-    if (NS_WARN_IF(!browserDOMWin)) {
-      *aResult = NS_ERROR_ABORT;
-      return IPC_OK();
-    }
-
-    bool isPrivate = false;
-    if (thisTabParent) {
-      nsCOMPtr<nsILoadContext> loadContext = thisTabParent->GetLoadContext();
-      loadContext->GetUsePrivateBrowsing(&isPrivate);
-    }
-
-    nsCOMPtr<nsIOpenURIInFrameParams> params =
-      new nsOpenURIInFrameParams(aOpenerOriginAttributes);
-    params->SetReferrer(NS_ConvertUTF8toUTF16(aBaseURI));
-    params->SetIsPrivate(isPrivate);
-
-    TabParent::AutoUseNewTab aunt(newTab, aWindowIsNew, aURLToLoad);
-
-    nsCOMPtr<nsIFrameLoaderOwner> frameLoaderOwner;
-    browserDOMWin->OpenURIInFrame(nullptr, params,
-                                  openLocation,
-                                  nsIBrowserDOMWindow::OPEN_NEW,
-                                  getter_AddRefs(frameLoaderOwner));
-    if (!frameLoaderOwner) {
-      *aWindowIsNew = false;
-    }
-
-    newTab->SwapFrameScriptsFrom(*aFrameScripts);
-
-    RenderFrameParent* rfp = static_cast<RenderFrameParent*>(aRenderFrame);
-    if (!newTab->SetRenderFrame(rfp) ||
-        !newTab->GetRenderFrameInfo(aTextureFactoryIdentifier, aLayersId)) {
-      *aResult = NS_ERROR_FAILURE;
-    }
-
-    return IPC_OK();
-  }
-
  TabParent::AutoUseNewTab aunt(newTab, aWindowIsNew, aURLToLoad);

-  nsCOMPtr<nsPIWindowWatcher> pwwatch =
-    do_GetService(NS_WINDOWWATCHER_CONTRACTID, aResult);
-
-  if (NS_WARN_IF(NS_FAILED(*aResult))) {
-    return IPC_OK();
-  }
-
  nsCOMPtr<nsITabParent> newRemoteTab;
-  if (!thisTabParent) {
-    // Because we weren't passed an opener tab, the content process has asked us
-    // to open a new window that is unrelated to a pre-existing tab.
-    *aResult = pwwatch->OpenWindowWithoutParent(getter_AddRefs(newRemoteTab));
-  } else {
-    *aResult = pwwatch->OpenWindowWithTabParent(thisTabParent, aFeatures, aCalledFromJS,
-                                                aFullZoom, getter_AddRefs(newRemoteTab));
+  mozilla::ipc::IPCResult ipcResult =
+    CommonCreateWindow(aThisTab, /* aSetOpener = */ true, aChromeFlags,
+                       aCalledFromJS, aPositionSpecified, aSizeSpecified,
+                       nullptr, aFeatures, aBaseURI, aOpenerOriginAttributes,
+                       aFullZoom, *aResult, newRemoteTab, aWindowIsNew);
+  if (!ipcResult) {
+    return ipcResult;
  }

  if (NS_WARN_IF(NS_FAILED(*aResult))) {
@ -4334,6 +4349,39 @@ ContentParent::RecvCreateWindow(PBrowserParent* aThisTab,
  return IPC_OK();
 }

+mozilla::ipc::IPCResult
+ContentParent::RecvCreateWindowInDifferentProcess(
+  PBrowserParent* aThisTab,
+  const uint32_t& aChromeFlags,
+  const bool& aCalledFromJS,
+  const bool& aPositionSpecified,
+  const bool& aSizeSpecified,
+  const URIParams& aURIToLoad,
+  const nsCString& aFeatures,
+  const nsCString& aBaseURI,
+  const DocShellOriginAttributes& aOpenerOriginAttributes,
+  const float& aFullZoom)
+{
+  nsCOMPtr<nsITabParent> newRemoteTab;
+  bool windowIsNew;
+  nsCOMPtr<nsIURI> uriToLoad = DeserializeURI(aURIToLoad);
+  nsresult rv;
+  mozilla::ipc::IPCResult ipcResult =
+    CommonCreateWindow(aThisTab, /* aSetOpener = */ false, aChromeFlags,
+                       aCalledFromJS, aPositionSpecified, aSizeSpecified,
+                       uriToLoad, aFeatures, aBaseURI, aOpenerOriginAttributes,
+                       aFullZoom, rv, newRemoteTab, &windowIsNew);
+  if (!ipcResult) {
+    return ipcResult;
+  }
+
+  if (NS_FAILED(rv)) {
+    NS_WARNING("Call to CommonCreateWindow failed.");
+  }
+
+  return IPC_OK();
+}
+
 mozilla::ipc::IPCResult
 ContentParent::RecvProfile(const nsCString& aProfile)
 {
--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@ -40,6 +40,7 @@
 class nsConsoleService;
 class nsICycleCollectorLogSink;
 class nsIDumpGCAndCCLogsCallback;
+class nsITabParent;
 class nsITimer;
 class ParentIdleListener;
 class nsIWidget;
@ -484,23 +485,36 @@ public:

  void ForkNewProcess(bool aBlocking);

-  virtual mozilla::ipc::IPCResult RecvCreateWindow(PBrowserParent* aThisTabParent,
-                                                   PBrowserParent* aOpener,
-                                                   layout::PRenderFrameParent* aRenderFrame,
-                                                   const uint32_t& aChromeFlags,
-                                                   const bool& aCalledFromJS,
-                                                   const bool& aPositionSpecified,
-                                                   const bool& aSizeSpecified,
-                                                   const nsCString& aFeatures,
-                                                   const nsCString& aBaseURI,
-                                                   const DocShellOriginAttributes& aOpenerOriginAttributes,
-                                                   const float& aFullZoom,
-                                                   nsresult* aResult,
-                                                   bool* aWindowIsNew,
-                                                   InfallibleTArray<FrameScriptInfo>* aFrameScripts,
-                                                   nsCString* aURLToLoad,
-                                                   layers::TextureFactoryIdentifier* aTextureFactoryIdentifier,
-                                                   uint64_t* aLayersId) override;
+  virtual mozilla::ipc::IPCResult
+  RecvCreateWindow(PBrowserParent* aThisTabParent,
+                   PBrowserParent* aNewTab,
+                   layout::PRenderFrameParent* aRenderFrame,
+                   const uint32_t& aChromeFlags,
+                   const bool& aCalledFromJS,
+                   const bool& aPositionSpecified,
+                   const bool& aSizeSpecified,
+                   const nsCString& aFeatures,
+                   const nsCString& aBaseURI,
+                   const DocShellOriginAttributes& aOpenerOriginAttributes,
+                   const float& aFullZoom,
+                   nsresult* aResult,
+                   bool* aWindowIsNew,
+                   InfallibleTArray<FrameScriptInfo>* aFrameScripts,
+                   nsCString* aURLToLoad,
+                   layers::TextureFactoryIdentifier* aTextureFactoryIdentifier,
+                   uint64_t* aLayersId) override;
+
+  virtual mozilla::ipc::IPCResult RecvCreateWindowInDifferentProcess(
+    PBrowserParent* aThisTab,
+    const uint32_t& aChromeFlags,
+    const bool& aCalledFromJS,
+    const bool& aPositionSpecified,
+    const bool& aSizeSpecified,
+    const URIParams& aURIToLoad,
+    const nsCString& aFeatures,
+    const nsCString& aBaseURI,
+    const DocShellOriginAttributes& aOpenerOriginAttributes,
+    const float& aFullZoom) override;

  static bool AllocateLayerTreeId(TabParent* aTabParent, uint64_t* aId);

@ -584,6 +598,22 @@ private:
      const bool& aIsForBrowser) override;
  using PContentParent::SendPTestShellConstructor;

+  mozilla::ipc::IPCResult
+  CommonCreateWindow(PBrowserParent* aThisTab,
+                     bool aSetOpener,
+                     const uint32_t& aChromeFlags,
+                     const bool& aCalledFromJS,
+                     const bool& aPositionSpecified,
+                     const bool& aSizeSpecified,
+                     nsIURI* aURIToLoad,
+                     const nsCString& aFeatures,
+                     const nsCString& aBaseURI,
+                     const DocShellOriginAttributes& aOpenerOriginAttributes,
+                     const float& aFullZoom,
+                     nsresult& aResult,
+                     nsCOMPtr<nsITabParent>& aNewTabParent,
+                     bool* aWindowIsNew);
+
  FORWARD_SHMEM_ALLOCATOR_TO(PContentParent)

  ContentParent(ContentParent* aOpener,
--- a/dom/ipc/PContent.ipdl
+++ b/dom/ipc/PContent.ipdl
@ -1081,6 +1081,18 @@ parent:
               TextureFactoryIdentifier textureFactoryIdentifier,
               uint64_t layersId);

+    async CreateWindowInDifferentProcess(
+      PBrowser aThisTab,
+      uint32_t aChromeFlags,
+      bool aCalledFromJS,
+      bool aPositionSpecified,
+      bool aSizeSpecified,
+      URIParams aURIToLoad,
+      nsCString aFeatures,
+      nsCString aBaseURI,
+      DocShellOriginAttributes aOpenerOriginAttributes,
+      float aFullZoom);
+
    sync GetDeviceStorageLocation(nsString type)
        returns (nsString path);

--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@ -220,7 +220,7 @@ TabChildBase::DispatchMessageManagerMessage(const nsAString& aMessageName,
 {
    AutoSafeJSContext cx;
    JS::Rooted<JS::Value> json(cx, JS::NullValue());
-    StructuredCloneData data;
+    dom::ipc::StructuredCloneData data;
    if (JS_ParseJSON(cx,
                      static_cast<const char16_t*>(aJSONData.BeginReading()),
                      aJSONData.Length(),
--- a/embedding/browser/nsIWebBrowserChrome3.idl
+++ b/embedding/browser/nsIWebBrowserChrome3.idl
@ -48,6 +48,8 @@ interface nsIWebBrowserChrome3 : nsIWebBrowserChrome2
                     in nsIURI         aURI,
                     in nsIURI         aReferrer);

+  bool shouldLoadURIInThisProcess(in nsIURI aURI);
+
  /**
   * Attempts to load the currently loaded page into a fresh process to increase
   * available memory.
--- a/xpfe/appshell/nsContentTreeOwner.cpp
+++ b/xpfe/appshell/nsContentTreeOwner.cpp
@ -404,6 +404,14 @@ NS_IMETHODIMP nsContentTreeOwner::ShouldLoadURI(nsIDocShell *aDocShell,
  return NS_OK;
 }

+NS_IMETHODIMP nsContentTreeOwner::ShouldLoadURIInThisProcess(nsIURI* aURI,
+                                                             bool* aRetVal)
+{
+  MOZ_ASSERT_UNREACHABLE("Should only be called in child process.");
+  *aRetVal = true;
+  return NS_OK;
+}
+
 NS_IMETHODIMP nsContentTreeOwner::ReloadInFreshProcess(nsIDocShell* aDocShell,
                                                       nsIURI* aURI,
                                                       nsIURI* aReferrer,