Use ContextProvider subclass to provide WGC3D pointers

content/renderer/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 CONTENT_RENDERER_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_
 #define CONTENT_RENDERER_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3DProvider.h"
 
-namespace cc {
-class ContextProvider;
-}
-
 namespace content {
+class ContextProviderWebContext;
 
 class CONTENT_EXPORT WebGraphicsContext3DProviderImpl
     : public NON_EXPORTED_BASE(blink::WebGraphicsContext3DProvider) {
  public:
   explicit WebGraphicsContext3DProviderImpl(
-      scoped_refptr<cc::ContextProvider> provider);
+      scoped_refptr<ContextProviderWebContext> provider);
   virtual ~WebGraphicsContext3DProviderImpl();
 
   // WebGraphicsContext3DProvider implementation.
   virtual blink::WebGraphicsContext3D* context3d() OVERRIDE;
   virtual GrContext* grContext() OVERRIDE;
 
  private:
-  scoped_refptr<cc::ContextProvider> provider_;
+  scoped_refptr<ContextProviderWebContext> provider_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_