Expose GLES2Interface to blink, and delete isContextLost() from WGC3D.

content/renderer/webgraphicscontext3d_provider_impl.h

 // Copyright 2014 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_blink {
 class ContextProviderWebContext;
 }
 
+namespace gpu {
+namespace gles2 {
+class GLES2Interface;
+}
+}
+
 namespace content {
 
 class CONTENT_EXPORT WebGraphicsContext3DProviderImpl
     : public NON_EXPORTED_BASE(blink::WebGraphicsContext3DProvider) {
  public:
   explicit WebGraphicsContext3DProviderImpl(
       scoped_refptr<cc_blink::ContextProviderWebContext> provider);
   ~WebGraphicsContext3DProviderImpl() override;
 
   // WebGraphicsContext3DProvider implementation.
   blink::WebGraphicsContext3D* context3d() override;
   GrContext* grContext() override;
+  gpu::gles2::GLES2Interface* getGLInterface() override;
 
  private:
   scoped_refptr<cc_blink::ContextProviderWebContext> provider_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEBGRAPHICSCONTEXT3D_PROVIDER_IMPL_H_