Allow each WGC3D subclass to determine the correct GrGLInterface for its GrContext.

webkit/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h

 // Copyright (c) 2011 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_GPU_WEBGRAPHICSCONTEXT3D_IN_PROCESS_COMMAND_BUFFER_IMPL_H_
 #define WEBKIT_GPU_WEBGRAPHICSCONTEXT3D_IN_PROCESS_COMMAND_BUFFER_IMPL_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 412 matching lines @@
 
   virtual WebGLId createCompositorTexture(WGC3Dsizei width, WGC3Dsizei height);
   virtual void deleteCompositorTexture(WebGLId parent_texture);
   virtual void copyTextureToCompositor(WebGLId texture,
                                        WebGLId parent_texture);
 
   virtual void setContextLostCallback(
       WebGraphicsContext3D::WebGraphicsContextLostCallback* callback);
   virtual WGC3Denum getGraphicsResetStatusARB();
 
+#if WEBKIT_USING_SKIA
+  virtual GrGLInterface* grGLInterface();
+#endif
+
  private:
   // SwapBuffers callback.
   void OnSwapBuffersComplete();
   virtual void OnContextLost();
 
   // Used to try to find bugs in code that calls gl directly through the gl api
   // instead of going through WebGraphicsContext3D.
   void ClearContext();
 
   // The context we use for OpenGL rendering.
@@ skipping 27 matching lines @@
 #endif
 };
 
 }  // namespace gpu
 }  // namespace webkit
 
 #endif  // defined(ENABLE_GPU)
 #endif  // WEBKIT_GPU_WEBGRAPHICSCONTEXT3D_IN_PROCESS_COMMAND_BUFFER_IMPL_H_