Use ContextProvider subclass to provide WGC3D pointers

webkit/common/gpu/webgraphicscontext3d_provider_impl.h

-// Copyright (c) 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.
-
-#ifndef WEBKIT_COMMON_GPU_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_
-#define WEBKIT_COMMON_GPU_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "third_party/WebKit/public/platform/WebGraphicsContext3DProvider.h"
-#include "webkit/common/gpu/webkit_gpu_export.h"
-
-namespace cc { class ContextProvider; }
-
-namespace webkit {
-namespace gpu {
-
-class WEBKIT_GPU_EXPORT WebGraphicsContext3DProviderImpl
-    : public NON_EXPORTED_BASE(blink::WebGraphicsContext3DProvider) {
- public:
-  explicit WebGraphicsContext3DProviderImpl(
-      scoped_refptr<cc::ContextProvider> provider);
-  virtual ~WebGraphicsContext3DProviderImpl();
-
-  // WebGraphicsContext3DProvider implementation.
-  virtual blink::WebGraphicsContext3D* context3d() OVERRIDE;
-  virtual GrContext* grContext() OVERRIDE;
-
- private:
-  scoped_refptr<cc::ContextProvider> provider_;
-};
-
-}  // namespace gpu
-}  // namespace webkit
-
-#endif  // WEBKIT_COMMON_GPU_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_