Bug 1650996 - P1. Remove RemodeDecoderManagerChild::CanSend method. r=mattwoodrow

The base IProtocol class already provides this.

Differential Revision: https://phabricator.services.mozilla.com/D82501

dom/media/ipc/RemoteDecoderManagerChild.cpp

@@ -156,10 +156,10 @@ void RemoteDecoderManagerChild::OpenForRDDProcess(
   // ipdl if:
   // 1) haven't init'd sRemoteDecoderManagerChild
   // or
-  // 2) if ActorDestroy was called (mCanSend is false) meaning the other
-  // end of the ipc channel was torn down
+  // 2) if ActorDestroy was called meaning the other end of the ipc channel was
+  //    torn down
   if (sRemoteDecoderManagerChildForRDDProcess &&
-      sRemoteDecoderManagerChildForRDDProcess->mCanSend) {
+      sRemoteDecoderManagerChildForRDDProcess->CanSend()) {
     return;
   }
   sRemoteDecoderManagerChildForRDDProcess = nullptr;
@@ -193,21 +193,11 @@ void RemoteDecoderManagerChild::OpenForGPUProcess(
 }
 
 void RemoteDecoderManagerChild::InitIPDL() {
-  mCanSend = true;
   mIPDLSelfRef = this;
 }
 
-void RemoteDecoderManagerChild::ActorDestroy(ActorDestroyReason aWhy) {
-  mCanSend = false;
-}
-
 void RemoteDecoderManagerChild::ActorDealloc() { mIPDLSelfRef = nullptr; }
 
-bool RemoteDecoderManagerChild::CanSend() {
-  MOZ_ASSERT(NS_GetCurrentThread() == GetManagerThread());
-  return mCanSend;
-}
-
 bool RemoteDecoderManagerChild::DeallocShmem(mozilla::ipc::Shmem& aShmem) {
   if (NS_GetCurrentThread() != sRemoteDecoderManagerChildThread) {
     RefPtr<RemoteDecoderManagerChild> self = this;

dom/media/ipc/RemoteDecoderManagerChild.h

@@ -63,13 +63,11 @@ class RemoteDecoderManagerChild final
   // called from the manager thread.
   void RunWhenGPUProcessRecreated(already_AddRefed<Runnable> aTask);
 
-  bool CanSend();
   layers::VideoBridgeSource GetSource() const { return mSource; }
 
  protected:
   void InitIPDL();
 
-  void ActorDestroy(ActorDestroyReason aWhy) override;
   void ActorDealloc() override;
 
   void HandleFatalError(const char* aMsg) const override;
@@ -97,9 +95,6 @@ class RemoteDecoderManagerChild final
 
   // The associated source of this decoder manager
   layers::VideoBridgeSource mSource;
-
-  // Should only ever be accessed on the manager thread.
-  bool mCanSend = false;
 };
 
 }  // namespace mozilla