Revert of Decouple Media Service

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index 1bb3df07e35f42846c9f352ac69012eda1b1bc1c..74f041fba10aaef91124426c791a27890466bd8d 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -18,7 +18,6 @@
 #include "content/common/gpu/gpu_host_messages.h"
 #include "content/common/gpu/gpu_memory_buffer_factory.h"
 #include "content/common/gpu/media/gpu_video_decode_accelerator.h"
-#include "content/common/gpu/media/media_service.h"
 #include "content/gpu/gpu_process_control_impl.h"
 #include "content/gpu/gpu_watchdog_thread.h"
 #include "content/public/common/content_client.h"
@@ -303,7 +302,6 @@
 }
 
 void GpuChildThread::DidDestroyChannel(int client_id) {
-  media_service_->RemoveChannel(client_id);
   Send(new GpuHostMsg_DestroyChannel(client_id));
 }
 
@@ -378,8 +376,6 @@
                             ChildProcess::current()->io_task_runner(),
                             ChildProcess::current()->GetShutDownEvent(),
                             sync_point_manager_, gpu_memory_buffer_factory_));
-
-  media_service_.reset(new MediaService(gpu_channel_manager_.get()));
 
 #if defined(USE_OZONE)
   ui::OzonePlatform::GetInstance()
@@ -569,7 +565,6 @@
 
   IPC::ChannelHandle channel_handle =
       gpu_channel_manager_->EstablishChannel(params);
-  media_service_->AddChannel(params.client_id);
   Send(new GpuHostMsg_ChannelEstablished(channel_handle));
 }
 
@@ -606,10 +601,8 @@
 #endif
 
 void GpuChildThread::OnLoseAllContexts() {
-  if (gpu_channel_manager_) {
+  if (gpu_channel_manager_)
     gpu_channel_manager_->DestroyAllChannels();
-    media_service_->DestroyAllChannels();
-  }
 }
 
 void GpuChildThread::BindProcessControlRequest(