Bug 1359718 - Get rid of PBlob - part 0 - remove PMemoryStream, r=smaug

dom/file/ipc/Blob.cpp

@@ -25,8 +25,6 @@
 #include "mozilla/dom/PBlobStreamChild.h"
 #include "mozilla/dom/PBlobStreamParent.h"
 #include "mozilla/dom/indexedDB/FileSnapshot.h"
-#include "mozilla/dom/ipc/MemoryStreamChild.h"
-#include "mozilla/dom/ipc/MemoryStreamParent.h"
 #include "mozilla/dom/IndexedDatabaseManager.h"
 #include "mozilla/ipc/InputStreamUtils.h"
 #include "mozilla/ipc/IPCStreamUtils.h"
@@ -620,115 +618,6 @@ struct MOZ_STACK_CLASS CreateBlobImplMetadata final
   }
 };
 
-template<class M>
-PMemoryStreamChild*
-SerializeInputStreamInChunks(nsIInputStream* aInputStream, uint64_t aLength,
-                             M* aManager)
-{
-  MOZ_ASSERT(aInputStream);
-
-  PMemoryStreamChild* child = aManager->SendPMemoryStreamConstructor(aLength);
-  if (NS_WARN_IF(!child)) {
-    return nullptr;
-  }
-
-  const uint64_t kMaxChunk = 1024 * 1024;
-
-  while (aLength) {
-    FallibleTArray<uint8_t> buffer;
-
-    uint64_t size = XPCOM_MIN(aLength, kMaxChunk);
-    if (NS_WARN_IF(!buffer.SetLength(size, fallible))) {
-      return nullptr;
-    }
-
-    uint32_t read;
-    nsresult rv = aInputStream->Read(reinterpret_cast<char*>(buffer.Elements()),
-                                     size, &read);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      return nullptr;
-    }
-
-    if (NS_WARN_IF(read == 0)) {
-      // We were not expecting a read==0 here.
-      return nullptr;
-    }
-
-    MOZ_ASSERT(read <= size);
-    aLength -= read;
-
-    if (NS_WARN_IF(!buffer.SetLength(read, fallible))) {
-      return nullptr;
-    }
-
-    if (NS_WARN_IF(!child->SendAddChunk(buffer))) {
-      return nullptr;
-    }
-  }
-
-  return child;
-}
-
-void
-DeleteStreamMemoryFromBlobDataStream(BlobDataStream& aStream)
-{
-  if (aStream.type() == BlobDataStream::TMemoryBlobDataStream) {
-    PMemoryStreamChild* actor =
-      aStream.get_MemoryBlobDataStream().streamChild();
-    if (actor) {
-      actor->Send__delete__(actor);
-    }
-  }
-}
-
-void
-DeleteStreamMemoryFromBlobData(BlobData& aBlobData)
-{
-  switch (aBlobData.type()) {
-    case BlobData::TBlobDataStream:
-      DeleteStreamMemoryFromBlobDataStream(aBlobData.get_BlobDataStream());
-      return;
-
-    case BlobData::TArrayOfBlobData: {
-      nsTArray<BlobData>& arrayBlobData = aBlobData.get_ArrayOfBlobData();
-      for (uint32_t i = 0; i < arrayBlobData.Length(); ++i) {
-        DeleteStreamMemoryFromBlobData(arrayBlobData[i]);
-      }
-      return;
-    }
-
-    default:
-      // Nothing to do here.
-      return;
-  }
-}
-
-void
-DeleteStreamMemoryFromOptionalBlobData(OptionalBlobData& aParams)
-{
-  if (aParams.type() == OptionalBlobData::Tvoid_t) {
-    return;
-  }
-
-  DeleteStreamMemoryFromBlobData(aParams.get_BlobData());
-}
-
-void
-DeleteStreamMemory(AnyBlobConstructorParams& aParams)
-{
-  if (aParams.type() == AnyBlobConstructorParams::TFileBlobConstructorParams) {
-    FileBlobConstructorParams& fileParams = aParams.get_FileBlobConstructorParams();
-    DeleteStreamMemoryFromOptionalBlobData(fileParams.optionalBlobData());
-    return;
-  }
-
-  if (aParams.type() == AnyBlobConstructorParams::TNormalBlobConstructorParams) {
-    NormalBlobConstructorParams& normalParams = aParams.get_NormalBlobConstructorParams();
-    DeleteStreamMemoryFromOptionalBlobData(normalParams.optionalBlobData());
-    return;
-  }
-}
-
 } // namespace
 
 already_AddRefed<BlobImpl>
@@ -760,32 +649,16 @@ CreateBlobImpl(const BlobDataStream& aStream,
   nsCOMPtr<nsIInputStream> inputStream;
   uint64_t length;
 
-  if (aStream.type() == BlobDataStream::TMemoryBlobDataStream) {
-    const MemoryBlobDataStream& memoryBlobDataStream =
-      aStream.get_MemoryBlobDataStream();
+  MOZ_ASSERT(aStream.type() == BlobDataStream::TIPCStream);
+  inputStream = DeserializeIPCStream(aStream.get_IPCStream());
+  if (!inputStream) {
+    ASSERT_UNLESS_FUZZING();
+    return nullptr;
+  }
 
-    MemoryStreamParent* actor =
-      static_cast<MemoryStreamParent*>(memoryBlobDataStream.streamParent());
-
-    actor->GetStream(getter_AddRefs(inputStream));
-    if (!inputStream) {
-      ASSERT_UNLESS_FUZZING();
-      return nullptr;
-    }
-
-    length = memoryBlobDataStream.length();
-  } else {
-    MOZ_ASSERT(aStream.type() == BlobDataStream::TIPCStream);
-    inputStream = DeserializeIPCStream(aStream.get_IPCStream());
-    if (!inputStream) {
-      ASSERT_UNLESS_FUZZING();
-      return nullptr;
-    }
-
-    nsresult rv = inputStream->Available(&length);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      return nullptr;
-    }
+  nsresult rv = inputStream->Available(&length);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nullptr;
   }
 
   RefPtr<BlobImpl> blobImpl;
@@ -1039,14 +912,7 @@ BlobDataFromBlobImpl(ChildManagerType* aManager, BlobImpl* aBlobImpl,
     return true;
   }
 
-  PMemoryStreamChild* streamActor =
-    SerializeInputStreamInChunks(inputStream, length, aManager);
-  if (!streamActor) {
-    return false;
-  }
-
-  aBlobData = MemoryBlobDataStream(nullptr, streamActor, length);
-  return true;
+  return false;
 }
 
 RemoteInputStream::RemoteInputStream(BlobImpl* aBlobImpl,
@@ -3704,8 +3570,6 @@ BlobChild::GetOrCreateFromImpl(ChildManagerType* aManager,
     return nullptr;
   }
 
-  DeleteStreamMemory(params.blobParams());
-
   autoIPCStreams.Clear();
   return actor;
 }

dom/file/ipc/MemoryStreamChild.h

@@ -1,22 +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_ipc_MemoryStreamChild_h
-#define mozilla_dom_ipc_MemoryStreamChild_h
-
-#include "mozilla/ipc/PMemoryStreamChild.h"
-
-namespace mozilla {
-namespace dom {
-
-class MemoryStreamChild final : public mozilla::ipc::PMemoryStreamChild
-{
-};
-
-} // namespace dom
-} // namespace mozilla
-
-#endif // mozilla_dom_ipc_MemoryStreamChild_h

dom/file/ipc/MemoryStreamParent.cpp

@@ -1,78 +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 "MemoryStreamParent.h"
-#include "nsIInputStream.h"
-
-namespace mozilla {
-namespace dom {
-
-MemoryStreamParent::MemoryStreamParent(uint64_t aSize)
-  : mSize(aSize)
-  , mCurSize(0)
-{}
-
-mozilla::ipc::IPCResult
-MemoryStreamParent::RecvAddChunk(nsTArray<unsigned char>&& aData)
-{
-  MOZ_ASSERT(mSize);
-
-  uint64_t dataLength = aData.Length();
-
-  if (!dataLength || mSize < (mCurSize + dataLength)) {
-    return IPC_FAIL_NO_REASON(this);
-  }
-
-  void* buffer = malloc(dataLength);
-  if (NS_WARN_IF(!buffer)) {
-    return IPC_FAIL_NO_REASON(this);
-  }
-
-  memcpy(buffer, aData.Elements(), dataLength);
-  mData.AppendElement(new MemoryBlobImpl::DataOwner(buffer, dataLength));
-
-  mCurSize += dataLength;
-  return IPC_OK();
-}
-
-void
-MemoryStreamParent::ActorDestroy(IProtocol::ActorDestroyReason)
-{
-}
-
-void
-MemoryStreamParent::GetStream(nsIInputStream** aInputStream)
-{
-  if (mCurSize != mSize) {
-    *aInputStream = nullptr;
-    return;
-  }
-
-  nsCOMPtr<nsIMultiplexInputStream> stream =
-    do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1");
-  if (NS_WARN_IF(!stream)) {
-    *aInputStream = nullptr;
-    return;
-  }
-
-  for (uint32_t i = 0; i < mData.Length(); ++i) {
-    nsCOMPtr<nsIInputStream> dataStream;
-    nsresult rv =
-      MemoryBlobImpl::DataOwnerAdapter::Create(mData[i], 0, mData[i]->mLength,
-                                               getter_AddRefs(dataStream));
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      *aInputStream = nullptr;
-      return;
-    }
-
-    stream->AppendStream(dataStream);
-  }
-
-  stream.forget(aInputStream);
-}
-
-} // namespace dom
-} // namespace mozilla

dom/file/ipc/MemoryStreamParent.h

@@ -1,40 +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_ipc_MemoryStreamParent_h
-#define mozilla_dom_ipc_MemoryStreamParent_h
-
-#include "mozilla/ipc/PMemoryStreamParent.h"
-#include "mozilla/dom/MemoryBlobImpl.h"
-
-namespace mozilla {
-namespace dom {
-
-class MemoryStreamParent final : public mozilla::ipc::PMemoryStreamParent
-{
-public:
-  explicit MemoryStreamParent(uint64_t aSize);
-
-  mozilla::ipc::IPCResult
-  RecvAddChunk(nsTArray<unsigned char>&& aData) override;
-
-  void
-  ActorDestroy(IProtocol::ActorDestroyReason) override;
-
-  void
-  GetStream(nsIInputStream** aInputStream);
-
-private:
-  uint64_t mSize;
-  uint64_t mCurSize;
-
-  nsTArray<RefPtr<MemoryBlobImpl::DataOwner>> mData;
-};
-
-} // namespace dom
-} // namespace mozilla
-
-#endif // mozilla_dom_ipc_MemoryStreamParent_h

dom/file/ipc/PBlob.ipdl

@@ -9,7 +9,6 @@ include protocol PContentBridge;
 include protocol PFileDescriptorSet;
 include protocol PChildToParentStream;
 include protocol PParentToChildStream;
-include protocol PMemoryStream;
 
 include BlobTypes;
 include DOMTypes;

dom/file/ipc/PMemoryStream.ipdl

@@ -1,23 +0,0 @@
-/* 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 protocol PBackground;
-include protocol PContent;
-include protocol PContentBridge;
-
-namespace mozilla {
-namespace ipc {
-
-protocol PMemoryStream
-{
-  manager PBackground or PContent or PContentBridge;
-
-parent:
-  async AddChunk(uint8_t[] data);
-
-  async __delete__();
-};
-
-} // namespace dom
-} // namespace mozilla

dom/file/ipc/moz.build

@@ -11,8 +11,6 @@ EXPORTS.mozilla.dom.ipc += [
     'IPCBlobInputStreamChild.h',
     'IPCBlobInputStreamParent.h',
     'IPCBlobInputStreamStorage.h',
-    'MemoryStreamChild.h',
-    'MemoryStreamParent.h',
     'nsIRemoteBlob.h',
     'PendingIPCBlobChild.h',
     'PendingIPCBlobParent.h',
@@ -29,7 +27,6 @@ UNIFIED_SOURCES += [
     'IPCBlobInputStreamParent.cpp',
     'IPCBlobInputStreamStorage.cpp',
     'IPCBlobUtils.cpp',
-    'MemoryStreamParent.cpp',
     'PendingIPCBlobChild.cpp',
     'PendingIPCBlobParent.cpp',
 ]
@@ -40,7 +37,6 @@ IPDL_SOURCES += [
     'PBlob.ipdl',
     'PBlobStream.ipdl',
     'PIPCBlobInputStream.ipdl',
-    'PMemoryStream.ipdl',
     'PPendingIPCBlob.ipdl',
 ]
 

dom/ipc/ContentBridgeChild.cpp

@@ -68,12 +68,6 @@ ContentBridgeChild::SendPBlobConstructor(PBlobChild* actor,
   return PContentBridgeChild::SendPBlobConstructor(actor, params);
 }
 
-PMemoryStreamChild*
-ContentBridgeChild::SendPMemoryStreamConstructor(const uint64_t& aSize)
-{
-  return PContentBridgeChild::SendPMemoryStreamConstructor(aSize);
-}
-
 bool
 ContentBridgeChild::SendPBrowserConstructor(PBrowserChild* aActor,
                                             const TabId& aTabId,
@@ -180,18 +174,6 @@ ContentBridgeChild::DeallocPBlobChild(PBlobChild* aActor)
   return nsIContentChild::DeallocPBlobChild(aActor);
 }
 
-PMemoryStreamChild*
-ContentBridgeChild::AllocPMemoryStreamChild(const uint64_t& aSize)
-{
-  return nsIContentChild::AllocPMemoryStreamChild(aSize);
-}
-
-bool
-ContentBridgeChild::DeallocPMemoryStreamChild(PMemoryStreamChild* aActor)
-{
-  return nsIContentChild::DeallocPMemoryStreamChild(aActor);
-}
-
 PIPCBlobInputStreamChild*
 ContentBridgeChild::AllocPIPCBlobInputStreamChild(const nsID& aID,
                                                   const uint64_t& aSize)

dom/ipc/ContentBridgeChild.h

@@ -36,9 +36,6 @@ public:
   SendPBlobConstructor(PBlobChild* actor,
                        const BlobConstructorParams& aParams) override;
 
-  virtual PMemoryStreamChild*
-  SendPMemoryStreamConstructor(const uint64_t& aSize) override;
-
   jsipc::CPOWManager* GetCPOWManager() override;
 
   virtual bool SendPBrowserConstructor(PBrowserChild* aActor,
@@ -88,10 +85,6 @@ protected:
   virtual PBlobChild* AllocPBlobChild(const BlobConstructorParams& aParams) override;
   virtual bool DeallocPBlobChild(PBlobChild*) override;
 
-  virtual PMemoryStreamChild*
-  AllocPMemoryStreamChild(const uint64_t& aSize) override;
-  virtual bool DeallocPMemoryStreamChild(PMemoryStreamChild*) override;
-
   virtual PIPCBlobInputStreamChild*
   AllocPIPCBlobInputStreamChild(const nsID& aID,
                                 const uint64_t& aSize) override;

dom/ipc/ContentBridgeParent.cpp

@@ -7,7 +7,6 @@
 #include "mozilla/dom/ContentBridgeParent.h"
 #include "mozilla/dom/TabParent.h"
 #include "mozilla/jsipc/CrossProcessObjectWrappers.h"
-#include "mozilla/dom/ipc/MemoryStreamParent.h"
 #include "nsXULAppAPI.h"
 #include "nsIObserverService.h"
 #include "base/task.h"
@@ -140,18 +139,6 @@ ContentBridgeParent::SendPIPCBlobInputStreamConstructor(PIPCBlobInputStreamParen
     PContentBridgeParent::SendPIPCBlobInputStreamConstructor(aActor, aID, aSize);
 }
 
-PMemoryStreamParent*
-ContentBridgeParent::AllocPMemoryStreamParent(const uint64_t& aSize)
-{
-  return nsIContentParent::AllocPMemoryStreamParent(aSize);
-}
-
-bool
-ContentBridgeParent::DeallocPMemoryStreamParent(PMemoryStreamParent* aActor)
-{
-  return nsIContentParent::DeallocPMemoryStreamParent(aActor);
-}
-
 PIPCBlobInputStreamParent*
 ContentBridgeParent::AllocPIPCBlobInputStreamParent(const nsID& aID,
                                                     const uint64_t& aSize)

dom/ipc/ContentBridgeParent.h

@@ -138,11 +138,6 @@ protected:
 
   virtual bool DeallocPBlobParent(PBlobParent*) override;
 
-  virtual PMemoryStreamParent*
-  AllocPMemoryStreamParent(const uint64_t& aSize) override;
-
-  virtual bool DeallocPMemoryStreamParent(PMemoryStreamParent*) override;
-
   virtual PIPCBlobInputStreamParent*
   SendPIPCBlobInputStreamConstructor(PIPCBlobInputStreamParent* aActor,
                                      const nsID& aID,

dom/ipc/ContentChild.cpp

@@ -1637,18 +1637,6 @@ ContentChild::DeallocPBrowserChild(PBrowserChild* aIframe)
   return nsIContentChild::DeallocPBrowserChild(aIframe);
 }
 
-PMemoryStreamChild*
-ContentChild::AllocPMemoryStreamChild(const uint64_t& aSize)
-{
-  return nsIContentChild::AllocPMemoryStreamChild(aSize);
-}
-
-bool
-ContentChild::DeallocPMemoryStreamChild(PMemoryStreamChild* aActor)
-{
-  return nsIContentChild::DeallocPMemoryStreamChild(aActor);
-}
-
 PIPCBlobInputStreamChild*
 ContentChild::AllocPIPCBlobInputStreamChild(const nsID& aID,
                                             const uint64_t& aSize)
@@ -1699,16 +1687,6 @@ ContentChild::SendPBlobConstructor(PBlobChild* aActor,
   return PContentChild::SendPBlobConstructor(aActor, aParams);
 }
 
-PMemoryStreamChild*
-ContentChild::SendPMemoryStreamConstructor(const uint64_t& aSize)
-{
-  if (IsShuttingDown()) {
-    return nullptr;
-  }
-
-  return PContentChild::SendPMemoryStreamConstructor(aSize);
-}
-
 PPresentationChild*
 ContentChild::AllocPPresentationChild()
 {

dom/ipc/ContentChild.h

@@ -189,12 +189,6 @@ public:
 
   virtual bool DeallocPBlobChild(PBlobChild* aActor) override;
 
-  virtual PMemoryStreamChild*
-  AllocPMemoryStreamChild(const uint64_t& aSize) override;
-
-  virtual bool
-  DeallocPMemoryStreamChild(PMemoryStreamChild* aActor) override;
-
   virtual PIPCBlobInputStreamChild*
   AllocPIPCBlobInputStreamChild(const nsID& aID,
                                 const uint64_t& aSize) override;
@@ -523,9 +517,6 @@ public:
   SendPBlobConstructor(PBlobChild* actor,
                        const BlobConstructorParams& params) override;
 
-  virtual PMemoryStreamChild*
-  SendPMemoryStreamConstructor(const uint64_t& aSize) override;
-
   virtual PFileDescriptorSetChild*
   SendPFileDescriptorSetConstructor(const FileDescriptor&) override;
 

dom/ipc/ContentParent.cpp

@@ -2850,18 +2850,6 @@ ContentParent::DeallocPBlobParent(PBlobParent* aActor)
   return nsIContentParent::DeallocPBlobParent(aActor);
 }
 
-PMemoryStreamParent*
-ContentParent::AllocPMemoryStreamParent(const uint64_t& aSize)
-{
-  return nsIContentParent::AllocPMemoryStreamParent(aSize);
-}
-
-bool
-ContentParent::DeallocPMemoryStreamParent(PMemoryStreamParent* aActor)
-{
-  return nsIContentParent::DeallocPMemoryStreamParent(aActor);
-}
-
 PIPCBlobInputStreamParent*
 ContentParent::AllocPIPCBlobInputStreamParent(const nsID& aID,
                                               const uint64_t& aSize)

dom/ipc/ContentParent.h

@@ -848,11 +848,6 @@ private:
 
   virtual bool DeallocPBlobParent(PBlobParent* aActor) override;
 
-  virtual PMemoryStreamParent*
-  AllocPMemoryStreamParent(const uint64_t& aSize) override;
-
-  virtual bool DeallocPMemoryStreamParent(PMemoryStreamParent* aActor) override;
-
   virtual PIPCBlobInputStreamParent*
   SendPIPCBlobInputStreamConstructor(PIPCBlobInputStreamParent* aActor,
                                      const nsID& aID,

dom/ipc/DOMTypes.ipdlh

@@ -5,7 +5,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 include protocol PBlob;
-include protocol PMemoryStream;
 
 include IPCBlob;
 include IPCStream;
@@ -47,18 +46,9 @@ struct ClonedMessageData
   MessagePortIdentifier[] identfiers;
 };
 
-struct MemoryBlobDataStream
-{
-  PMemoryStream stream;
-  uint64_t length;
-};
-
+// I could remove this completely, but this will be gone in the following patch.
 union BlobDataStream
 {
-  MemoryBlobDataStream;
-
-  // InputStreamParams is used only when we are _sure_ that the serialized size
-  // is lower than 1 Mb. Otherwise we use MemoryBlobDataStream.
   IPCStream;
 };
 

dom/ipc/PContent.ipdl

@@ -21,7 +21,6 @@ include protocol PProcessHangMonitor;
 include protocol PImageBridge;
 include protocol PIPCBlobInputStream;
 include protocol PMedia;
-include protocol PMemoryStream;
 include protocol PNecko;
 include protocol PGMPContent;
 include protocol PGMPService;
@@ -295,7 +294,6 @@ nested(upto inside_cpow) sync protocol PContent
     manages PHeapSnapshotTempFileHelper;
     manages PIPCBlobInputStream;
     manages PMedia;
-    manages PMemoryStream;
     manages PNecko;
     manages POfflineCacheUpdate;
     manages PPrinting;
@@ -680,8 +678,6 @@ parent:
 
     async PRemoteSpellcheckEngine();
 
-    async PMemoryStream(uint64_t aSize);
-
     async InitCrashReporter(Shmem shmem, NativeThreadId tid);
 
     /**

dom/ipc/PContentBridge.ipdl

@@ -10,7 +10,6 @@ include protocol PContent;
 include protocol PJavaScript;
 include protocol PFileDescriptorSet;
 include protocol PChildToParentStream;
-include protocol PMemoryStream;
 include protocol PParentToChildStream;
 include protocol PIPCBlobInputStream;
 
@@ -43,7 +42,6 @@ nested(upto inside_cpow) sync protocol PContentBridge
     manages PFileDescriptorSet;
     manages PJavaScript;
     manages PChildToParentStream;
-    manages PMemoryStream;
     manages PParentToChildStream;
     manages PIPCBlobInputStream;
 
@@ -71,8 +69,6 @@ parent:
 
     async PChildToParentStream();
 
-    async PMemoryStream(uint64_t aSize);
-
 both:
     // Both the parent and the child can construct the PBrowser.
     // See the comment in PContent::PBrowser().

dom/ipc/nsIContentChild.cpp

@@ -20,7 +20,6 @@
 #include "mozilla/ipc/IPCStreamSource.h"
 #include "mozilla/ipc/PChildToParentStreamChild.h"
 #include "mozilla/ipc/PParentToChildStreamChild.h"
-#include "mozilla/dom/ipc/MemoryStreamChild.h"
 #include "mozilla/dom/ipc/IPCBlobInputStreamChild.h"
 
 #include "nsPrintfCString.h"
@@ -107,19 +106,6 @@ nsIContentChild::RecvPBrowserConstructor(PBrowserChild* aActor,
   return IPC_OK();
 }
 
-PMemoryStreamChild*
-nsIContentChild::AllocPMemoryStreamChild(const uint64_t& aSize)
-{
-  return new MemoryStreamChild();
-}
-
-bool
-nsIContentChild::DeallocPMemoryStreamChild(PMemoryStreamChild* aActor)
-{
-  delete aActor;
-  return true;
-}
-
 PIPCBlobInputStreamChild*
 nsIContentChild::AllocPIPCBlobInputStreamChild(const nsID& aID,
                                                const uint64_t& aSize)

dom/ipc/nsIContentChild.h

@@ -64,9 +64,6 @@ public:
   SendPBlobConstructor(PBlobChild* aActor,
                        const BlobConstructorParams& aParams) = 0;
 
-  virtual mozilla::ipc::PMemoryStreamChild*
-  SendPMemoryStreamConstructor(const uint64_t& aSize) = 0;
-
   virtual bool
   SendPBrowserConstructor(PBrowserChild* aActor,
                           const TabId& aTabId,
@@ -106,11 +103,6 @@ protected:
 
   virtual bool DeallocPBlobChild(PBlobChild* aActor);
 
-  virtual mozilla::ipc::PMemoryStreamChild*
-  AllocPMemoryStreamChild(const uint64_t& aSize);
-
-  virtual bool DeallocPMemoryStreamChild(mozilla::ipc::PMemoryStreamChild* aActor);
-
   virtual mozilla::ipc::PIPCBlobInputStreamChild*
   AllocPIPCBlobInputStreamChild(const nsID& aID, const uint64_t& aSize);
 

dom/ipc/nsIContentParent.cpp

@@ -16,7 +16,6 @@
 #include "mozilla/dom/TabParent.h"
 #include "mozilla/dom/ipc/BlobParent.h"
 #include "mozilla/dom/ipc/IPCBlobInputStreamParent.h"
-#include "mozilla/dom/ipc/MemoryStreamParent.h"
 #include "mozilla/dom/ipc/StructuredCloneData.h"
 #include "mozilla/jsipc/CrossProcessObjectWrappers.h"
 #include "mozilla/ipc/FileDescriptorSetParent.h"
@@ -219,19 +218,6 @@ nsIContentParent::DeallocPBlobParent(PBlobParent* aActor)
   return true;
 }
 
-PMemoryStreamParent*
-nsIContentParent::AllocPMemoryStreamParent(const uint64_t& aSize)
-{
-  return new MemoryStreamParent(aSize);
-}
-
-bool
-nsIContentParent::DeallocPMemoryStreamParent(PMemoryStreamParent* aActor)
-{
-  delete aActor;
-  return true;
-}
-
 PIPCBlobInputStreamParent*
 nsIContentParent::AllocPIPCBlobInputStreamParent(const nsID& aID,
                                                  const uint64_t& aSize)

dom/ipc/nsIContentParent.h

@@ -36,7 +36,6 @@ namespace ipc {
 class PFileDescriptorSetParent;
 class PChildToParentStreamParent;
 class PParentToChildStreamParent;
-class PMemoryStreamParent;
 class PIPCBlobInputStreamParent;
 }
 
@@ -130,11 +129,6 @@ protected: // IPDL methods
 
   virtual bool DeallocPBlobParent(PBlobParent* aActor);
 
-  virtual mozilla::ipc::PMemoryStreamParent*
-  AllocPMemoryStreamParent(const uint64_t& aSize);
-
-  virtual bool DeallocPMemoryStreamParent(mozilla::ipc::PMemoryStreamParent* aActor);
-
   virtual mozilla::ipc::PIPCBlobInputStreamParent*
   AllocPIPCBlobInputStreamParent(const nsID& aID, const uint64_t& aSize);
 

ipc/glue/BackgroundChildImpl.cpp

@@ -25,7 +25,6 @@
 #include "mozilla/dom/indexedDB/PBackgroundIndexedDBUtilsChild.h"
 #include "mozilla/dom/ipc/BlobChild.h"
 #include "mozilla/dom/ipc/IPCBlobInputStreamChild.h"
-#include "mozilla/dom/ipc/MemoryStreamChild.h"
 #include "mozilla/dom/ipc/PendingIPCBlobChild.h"
 #include "mozilla/dom/quota/PQuotaChild.h"
 #include "mozilla/dom/GamepadEventChannelChild.h"
@@ -222,19 +221,6 @@ BackgroundChildImpl::DeallocPBlobChild(PBlobChild* aActor)
   return true;
 }
 
-PMemoryStreamChild*
-BackgroundChildImpl::AllocPMemoryStreamChild(const uint64_t& aSize)
-{
-  return new mozilla::dom::MemoryStreamChild();
-}
-
-bool
-BackgroundChildImpl::DeallocPMemoryStreamChild(PMemoryStreamChild* aActor)
-{
-  delete aActor;
-  return true;
-}
-
 PPendingIPCBlobChild*
 BackgroundChildImpl::AllocPPendingIPCBlobChild(const IPCBlob& aBlob)
 {

ipc/glue/BackgroundChildImpl.h

@@ -76,12 +76,6 @@ protected:
   virtual bool
   DeallocPBlobChild(PBlobChild* aActor) override;
 
-  virtual PMemoryStreamChild*
-  AllocPMemoryStreamChild(const uint64_t& aSize) override;
-
-  virtual bool
-  DeallocPMemoryStreamChild(PMemoryStreamChild* aActor) override;
-
   virtual PPendingIPCBlobChild*
   AllocPPendingIPCBlobChild(const IPCBlob& aBlob) override;
 

ipc/glue/BackgroundParentImpl.cpp

@@ -29,7 +29,6 @@
 #include "mozilla/dom/indexedDB/ActorsParent.h"
 #include "mozilla/dom/ipc/BlobParent.h"
 #include "mozilla/dom/ipc/IPCBlobInputStreamParent.h"
-#include "mozilla/dom/ipc/MemoryStreamParent.h"
 #include "mozilla/dom/ipc/PendingIPCBlobParent.h"
 #include "mozilla/dom/quota/ActorsParent.h"
 #include "mozilla/ipc/BackgroundParent.h"
@@ -271,26 +270,6 @@ BackgroundParentImpl::DeallocPBlobParent(PBlobParent* aActor)
   return true;
 }
 
-PMemoryStreamParent*
-BackgroundParentImpl::AllocPMemoryStreamParent(const uint64_t& aSize)
-{
-  AssertIsInMainProcess();
-  AssertIsOnBackgroundThread();
-
-  return new mozilla::dom::MemoryStreamParent(aSize);
-}
-
-bool
-BackgroundParentImpl::DeallocPMemoryStreamParent(PMemoryStreamParent* aActor)
-{
-  AssertIsInMainProcess();
-  AssertIsOnBackgroundThread();
-  MOZ_ASSERT(aActor);
-
-  delete aActor;
-  return true;
-}
-
 PPendingIPCBlobParent*
 BackgroundParentImpl::AllocPPendingIPCBlobParent(const IPCBlob& aBlob)
 {

ipc/glue/BackgroundParentImpl.h

@@ -69,12 +69,6 @@ protected:
   virtual bool
   DeallocPBlobParent(PBlobParent* aActor) override;
 
-  virtual PMemoryStreamParent*
-  AllocPMemoryStreamParent(const uint64_t& aSize) override;
-
-  virtual bool
-  DeallocPMemoryStreamParent(PMemoryStreamParent* aActor) override;
-
   virtual PPendingIPCBlobParent*
   AllocPPendingIPCBlobParent(const IPCBlob& aBlob) override;
 

ipc/glue/PBackground.ipdl

@@ -17,7 +17,6 @@ include protocol PGamepadEventChannel;
 include protocol PGamepadTestChannel;
 include protocol PIPCBlobInputStream;
 include protocol PPendingIPCBlob;
-include protocol PMemoryStream;
 include protocol PMessagePort;
 include protocol PCameras;
 include protocol PQuota;
@@ -65,7 +64,6 @@ sync protocol PBackground
   manages PGamepadEventChannel;
   manages PGamepadTestChannel;
   manages PIPCBlobInputStream;
-  manages PMemoryStream;
   manages PPendingIPCBlob;
   manages PMessagePort;
   manages PCameras;
@@ -119,8 +117,6 @@ parent:
 
   async PGamepadTestChannel();
 
-  async PMemoryStream(uint64_t aSize);
-
   async PWebAuthnTransaction();
 
 child: