Add command buffer support for GL_RGB CHROMIUM image emulation.

third_party/WebKit/public/platform/WebGraphicsContext3DProvider.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef WebGraphicsContext3DProvider_h
 #define WebGraphicsContext3DProvider_h
 
 #include "public/platform/functional/WebFunction.h"
 
 class GrContext;
 
 namespace gpu {
+struct Capabilities;

[dcheng, 2016/04/15 19:11:17]

I don't think you can use a forward declaration if something is being returned
by value.

[dcheng, 2016/04/15 19:12:52]

(Rather, this feels a bit like an IWYU violation. It's true that callers will
always have to include this, but it feels weird.)

+
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
 namespace blink {
 class WebGraphicsContext3D;
 
 class WebGraphicsContext3DProvider {
 public:
     virtual ~WebGraphicsContext3DProvider() { }
 
     virtual WebGraphicsContext3D* context3d() = 0;
     virtual gpu::gles2::GLES2Interface* contextGL() = 0;
     virtual GrContext* grContext() = 0;
+    virtual gpu::Capabilities getCapabilities() = 0;
 
     virtual void setLostContextCallback(WebClosure) = 0;
     virtual void setErrorMessageCallback(WebFunction<void(const char* msg, int32_t id)>) = 0;
 };
 
 } // namespace blink
 
 #endif