Use ContextProvider subclass to provide WGC3D pointers

content/renderer/media/renderer_gpu_video_accelerator_factories.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/renderer/media/renderer_gpu_video_accelerator_factories.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
 #include "base/bind.h"
@@ skipping 40 matching lines @@
 
 RendererGpuVideoAcceleratorFactories::RendererGpuVideoAcceleratorFactories()
     : aborted_waiter_(true, false),
       task_runner_async_waiter_(false, false) {}
 
 WebGraphicsContext3DCommandBufferImpl*
 RendererGpuVideoAcceleratorFactories::GetContext3d() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   if (!context_provider_)
     return NULL;
-  WebGraphicsContext3DCommandBufferImpl* context =
-      context_provider_->Context3d();
-  if (context->isContextLost()) {
+  if (context_provider_->IsContextLost()) {
     context_provider_->VerifyContexts();
     context_provider_ = NULL;
     return NULL;
   }
-  return context;
+  return context_provider_->WebContext3D();
 }
 
 void RendererGpuVideoAcceleratorFactories::AsyncBindContext() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   if (!context_provider_->BindToCurrentThread())
     context_provider_ = NULL;
   task_runner_async_waiter_.Signal();
 }
 
 scoped_ptr<media::VideoDecodeAccelerator>
@@ skipping 233 matching lines @@
 }
 
 void
 RendererGpuVideoAcceleratorFactories::AsyncDestroyVideoDecodeAccelerator() {
   // OK to release because Destroy() will delete the VDA instance.
   if (vda_)
     vda_.release()->Destroy();
 }
 
 }  // namespace content