Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/browser/gpu/browser_gpu_channel_host_factory.cc

 // Copyright (c) 2012 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/browser/gpu/browser_gpu_channel_host_factory.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 287 matching lines @@
   if (gpu_channel_) {
     gpu_channel_->DestroyChannel();
     gpu_channel_ = NULL;
   }
 }
 
 bool BrowserGpuChannelHostFactory::IsMainThread() {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
-scoped_refptr<base::SingleThreadTaskRunner>
-BrowserGpuChannelHostFactory::GetIOThreadTaskRunner() {
+scoped_refptr<base::MessageLoopProxy>
+BrowserGpuChannelHostFactory::GetIOLoopProxy() {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
 scoped_ptr<base::SharedMemory>
 BrowserGpuChannelHostFactory::AllocateSharedMemory(size_t size) {
   scoped_ptr<base::SharedMemory> shm(new base::SharedMemory());
   if (!shm->CreateAnonymous(size))
     return scoped_ptr<base::SharedMemory>();
   return shm.Pass();
 }
@@ skipping 26 matching lines @@
     CreateRequest* request, CreateCommandBufferResult result) {
   request->result = result;
   request->event.Signal();
 }
 
 CreateCommandBufferResult BrowserGpuChannelHostFactory::CreateViewCommandBuffer(
       int32 surface_id,
       const GPUCreateCommandBufferConfig& init_params,
       int32 route_id) {
   CreateRequest request(route_id);
-  GetIOThreadTaskRunner()->PostTask(
-      FROM_HERE,
-      base::Bind(&BrowserGpuChannelHostFactory::CreateViewCommandBufferOnIO,
-                 base::Unretained(this), &request, surface_id, init_params));
+  GetIOLoopProxy()->PostTask(FROM_HERE, base::Bind(
+        &BrowserGpuChannelHostFactory::CreateViewCommandBufferOnIO,
+        base::Unretained(this),
+        &request,
+        surface_id,
+        init_params));
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/125248 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "125248 BrowserGpuChannelHostFactory::CreateViewCommandBuffer"));
 
   // We're blocking the UI thread, which is generally undesirable.
   // In this case we need to wait for this before we can show any UI /anyway/,
   // so it won't cause additional jank.
   // TODO(piman): Make this asynchronous (http://crbug.com/125248).
   TRACE_EVENT0("browser",
@@ skipping 188 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   CreateGpuMemoryBufferCallbackMap::iterator iter =
       create_gpu_memory_buffer_requests_.find(request_id);
   DCHECK(iter != create_gpu_memory_buffer_requests_.end());
   iter->second.Run(handle);
   create_gpu_memory_buffer_requests_.erase(iter);
 }
 
 }  // namespace content