Added method to synchronize command buffers within GpuControl.

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 <stddef.h>
 #include <stdint.h>
 
 #include <queue>
@@ skipping 966 matching lines @@
 
 void InProcessCommandBuffer::SetLock(base::Lock*) {
 }
 
 bool InProcessCommandBuffer::IsGpuChannelLost() {
   // There is no such channel to lose for in-process contexts. This only
   // makes sense for out-of-process command buffers.
   return false;
 }
 
+void InProcessCommandBuffer::EnsureWorkVisible() {
+  // This is only relevant for out-of-process command buffers.
+}
+
 CommandBufferNamespace InProcessCommandBuffer::GetNamespaceID() const {
   return CommandBufferNamespace::IN_PROCESS;
 }
 
 uint64_t InProcessCommandBuffer::GetCommandBufferID() const {
   return command_buffer_id_;
 }
 
 int32_t InProcessCommandBuffer::GetExtraCommandBufferData() const {
   return 0;
@@ skipping 148 matching lines @@
     framebuffer_completeness_cache_ =
         new gpu::gles2::FramebufferCompletenessCache;
   return framebuffer_completeness_cache_;
 }
 
 SyncPointManager* GpuInProcessThread::sync_point_manager() {
   return sync_point_manager_;
 }
 
 }  // namespace gpu