Fixed DCHECK in InProcessGpuThread shutdown.

content/gpu/in_process_gpu_thread.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/gpu/in_process_gpu_thread.h"
 
 #include "content/gpu/gpu_child_thread.h"
 #include "content/gpu/gpu_process.h"
 
 namespace content {
 
 InProcessGpuThread::InProcessGpuThread(const std::string& channel_id)
     : base::Thread("Chrome_InProcGpuThread"),
       channel_id_(channel_id),
       gpu_process_(NULL) {
 }
 
 InProcessGpuThread::~InProcessGpuThread() {
   Stop();
 }
 
 void InProcessGpuThread::Init() {
   gpu_process_ = new GpuProcess();
   // The process object takes ownership of the thread object, so do not
   // save and delete the pointer.
   gpu_process_->set_main_thread(new GpuChildThread(channel_id_));
 }
 
 void InProcessGpuThread::CleanUp() {
+  SetThreadWasQuitProperly(true);
   delete gpu_process_;
 }
 
 base::Thread* CreateInProcessGpuThread(const std::string& channel_id) {
   return new InProcessGpuThread(channel_id);
 }
 
 }  // namespace content