Refactor MSE implementation on Android to simplify the logic and improve the performance

content/renderer/media/android/renderer_demuxer_android.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/android/renderer_demuxer_android.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/common/media/media_player_messages_android.h"
@@ skipping 24 matching lines @@
 
 void RendererDemuxerAndroid::RemoveDelegate(int demuxer_client_id) {
   DCHECK(media_message_loop_->BelongsToCurrentThread());
   delegates_.Remove(demuxer_client_id);
 }
 
 bool RendererDemuxerAndroid::OnMessageReceived(const IPC::Message& message) {
   switch (message.type()) {
     case MediaPlayerMsg_DemuxerSeekRequest::ID:
     case MediaPlayerMsg_ReadFromDemuxer::ID:
-    case MediaPlayerMsg_MediaConfigRequest::ID:
       media_message_loop_->PostTask(FROM_HERE, base::Bind(
           &RendererDemuxerAndroid::DispatchMessage, this, message));
       return true;
    }
   return false;
 }
 
 void RendererDemuxerAndroid::DemuxerReady(
     int demuxer_client_id,
     const media::DemuxerConfigs& configs) {
@@ skipping 18 matching lines @@
 void RendererDemuxerAndroid::DurationChanged(int demuxer_client_id,
                                              const base::TimeDelta& duration) {
   thread_safe_sender_->Send(new MediaPlayerHostMsg_DurationChanged(
       demuxer_client_id, duration));
 }
 
 void RendererDemuxerAndroid::DispatchMessage(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(RendererDemuxerAndroid, message)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_DemuxerSeekRequest, OnDemuxerSeekRequest)
     IPC_MESSAGE_HANDLER(MediaPlayerMsg_ReadFromDemuxer, OnReadFromDemuxer)
-    IPC_MESSAGE_HANDLER(MediaPlayerMsg_MediaConfigRequest, OnMediaConfigRequest)
   IPC_END_MESSAGE_MAP()
 }
 
 void RendererDemuxerAndroid::OnReadFromDemuxer(
     int demuxer_client_id,
     media::DemuxerStream::Type type) {
   MediaSourceDelegate* delegate = delegates_.Lookup(demuxer_client_id);
   if (delegate)
     delegate->OnReadFromDemuxer(type);
 }
 
 void RendererDemuxerAndroid::OnDemuxerSeekRequest(
     int demuxer_client_id,
     const base::TimeDelta& time_to_seek,
     bool is_browser_seek) {
   MediaSourceDelegate* delegate = delegates_.Lookup(demuxer_client_id);
   if (delegate)
     delegate->Seek(time_to_seek, is_browser_seek);
 }
 
-void RendererDemuxerAndroid::OnMediaConfigRequest(int demuxer_client_id) {
-  MediaSourceDelegate* delegate = delegates_.Lookup(demuxer_client_id);
-  if (delegate)
-    delegate->OnMediaConfigRequest();
-}
-
 }  // namespace content