Bug 1824465 - Part 7: Make PRemoteDecoderManager refcounted, r=ipc-reviewers,mccr8

Differential Revision: https://phabricator.services.mozilla.com/D173722

dom/media/ipc/PRemoteDecoderManager.ipdl

@@ -38,7 +38,7 @@ union RemoteDecoderInfoIPDL
   VideoDecoderInfoIPDL;
 };
 
-[ManualDealloc, NeedsOtherPid]
+[NeedsOtherPid]
 sync protocol PRemoteDecoderManager
 {
   manages PRemoteDecoder;

dom/media/ipc/RemoteDecoderManagerChild.cpp

@@ -768,15 +768,10 @@ void RemoteDecoderManagerChild::OpenRemoteDecoderManagerChildForProcess(
         new RemoteDecoderManagerChild(aLocation);
     if (aEndpoint.Bind(manager)) {
       remoteDecoderManagerChild = manager;
-      manager->InitIPDL();
     }
   }
 }
 
-void RemoteDecoderManagerChild::InitIPDL() { mIPDLSelfRef = this; }
-
-void RemoteDecoderManagerChild::ActorDealloc() { mIPDLSelfRef = nullptr; }
-
 bool RemoteDecoderManagerChild::DeallocShmem(mozilla::ipc::Shmem& aShmem) {
   nsCOMPtr<nsISerialEventTarget> managerThread = GetManagerThread();
   if (!managerThread) {

dom/media/ipc/RemoteDecoderManagerChild.h

@@ -107,10 +107,6 @@ class RemoteDecoderManagerChild final
       RemoteDecodeIn aLocation);
 
  protected:
-  void InitIPDL();
-
-  void ActorDealloc() override;
-
   void HandleFatalError(const char* aMsg) const override;
 
   PRemoteDecoderChild* AllocPRemoteDecoderChild(
@@ -140,7 +136,6 @@ class RemoteDecoderManagerChild final
   // A thread-safe method to launch the RDD process if it hasn't launched yet.
   static RefPtr<GenericNonExclusivePromise> LaunchRDDProcessIfNeeded();
 
-  RefPtr<RemoteDecoderManagerChild> mIPDLSelfRef;
   // The location for decoding, Rdd or Gpu process.
   const RemoteDecodeIn mLocation;
 };

dom/media/ipc/RemoteDecoderManagerParent.cpp

@@ -277,11 +277,8 @@ void RemoteDecoderManagerParent::Open(
     // We can't recover from this.
     MOZ_CRASH("Failed to bind RemoteDecoderManagerParent to endpoint");
   }
-  AddRef();
 }
 
-void RemoteDecoderManagerParent::ActorDealloc() { Release(); }
-
 mozilla::ipc::IPCResult RemoteDecoderManagerParent::RecvReadback(
     const SurfaceDescriptorGPUVideo& aSD, SurfaceDescriptor* aResult) {
   const SurfaceDescriptorRemoteDecoder& sd = aSD;

dom/media/ipc/RemoteDecoderManagerParent.h

@@ -76,7 +76,6 @@ class RemoteDecoderManagerParent final
       const SurfaceDescriptorGPUVideo& aSD);
 
   void ActorDestroy(mozilla::ipc::IProtocol::ActorDestroyReason) override;
-  void ActorDealloc() override;
 
  private:
   explicit RemoteDecoderManagerParent(nsISerialEventTarget* aThread);