Revert of Revert of Remove threading from RendererGpuVideoAcceleratorFactories

content/renderer/render_thread_impl.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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 877 matching lines @@
   idle_notifications_to_skip_ = 2;
 }
 
 scoped_refptr<RendererGpuVideoAcceleratorFactories>
 RenderThreadImpl::GetGpuFactories() {
   DCHECK(IsMainThread());
 
   scoped_refptr<GpuChannelHost> gpu_channel_host = GetGpuChannel();
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   scoped_refptr<RendererGpuVideoAcceleratorFactories> gpu_factories;
+  scoped_refptr<base::MessageLoopProxy> media_loop_proxy =
+      GetMediaThreadMessageLoopProxy();
   if (!cmd_line->HasSwitch(switches::kDisableAcceleratedVideoDecode)) {
     if (!gpu_va_context_provider_ ||
         gpu_va_context_provider_->DestroyedOnMainThread()) {
       if (!gpu_channel_host) {
         gpu_channel_host = EstablishGpuChannelSync(
             CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE);
       }
       gpu_va_context_provider_ = ContextProviderCommandBuffer::Create(
           make_scoped_ptr(
               WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
                   gpu_channel_host.get(),
                   blink::WebGraphicsContext3D::Attributes(),
                   GURL("chrome://gpu/RenderThreadImpl::GetGpuVDAContext3D"),
                   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits())),
           "GPU-VideoAccelerator-Offscreen");
+      media_loop_proxy->PostTask(
+          FROM_HERE,
+          base::Bind(
+              base::IgnoreResult(&cc::ContextProvider::BindToCurrentThread),
+              gpu_va_context_provider_));
     }
   }
   if (gpu_channel_host) {
     gpu_factories = new RendererGpuVideoAcceleratorFactories(
-        gpu_channel_host.get(), gpu_va_context_provider_);
+        gpu_channel_host, media_loop_proxy, gpu_va_context_provider_);
   }
   return gpu_factories;
 }
 
 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
 RenderThreadImpl::CreateOffscreenContext3d() {
   blink::WebGraphicsContext3D::Attributes attributes;
   attributes.shareResources = true;
   attributes.depth = false;
   attributes.stencil = false;
@@ skipping 480 matching lines @@
   hidden_widget_count_--;
 
   if (!GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     return;
   }
 
   ScheduleIdleHandler(kLongIdleHandlerDelayMs);
 }
 
 }  // namespace content