Add lock support for in process context provider.

gpu/command_buffer/service/in_process_command_buffer.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 "gpu/command_buffer/service/in_process_command_buffer.h"
 
 #include <queue>
 #include <set>
 #include <utility>
 
@@ skipping 886 matching lines @@
       base::Bind(&InProcessCommandBuffer::CreateStreamTextureOnGpuThread,
                  base::Unretained(this),
                  texture_id);
   QueueTask(
       base::Bind(&RunTaskWithResult<uint32>, task, &stream_id, &completion));
   completion.Wait();
   return stream_id;
 }
 
 void InProcessCommandBuffer::SetLock(base::Lock*) {
-  NOTIMPLEMENTED();
 }
 
 uint32 InProcessCommandBuffer::CreateStreamTextureOnGpuThread(
     uint32 client_texture_id) {
 #if defined(OS_ANDROID)
   return stream_texture_manager_->CreateStreamTexture(
       client_texture_id, decoder_->GetContextGroup()->texture_manager());
 #else
   return 0;
 #endif
@@ skipping 44 matching lines @@
 
 #if defined(OS_ANDROID)
 scoped_refptr<gfx::SurfaceTexture>
 InProcessCommandBuffer::GetSurfaceTexture(uint32 stream_id) {
   DCHECK(stream_texture_manager_);
   return stream_texture_manager_->GetSurfaceTexture(stream_id);
 }
 #endif
 
 }  // namespace gpu