Add GL_CHROMIUM_framebuffer_multisample support to Chromium's...

chrome/renderer/webgraphicscontext3d_command_buffer_impl.h

 // Copyright (c) 2010 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 CHROME_RENDERER_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #define CHROME_RENDERER_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 346 matching lines @@
       unsigned type,
       unsigned access);
   virtual void unmapTexSubImage2DCHROMIUM(const void*);
 
   virtual void copyTextureToParentTextureCHROMIUM(
       unsigned texture, unsigned parentTexture);
 
   virtual WebKit::WebString getRequestableExtensionsCHROMIUM();
   virtual void requestExtensionCHROMIUM(const char*);
 
+  virtual void blitFramebufferCHROMIUM(
+      int srcX0, int srcY0, int srcX1, int srcY1,
+      int dstX0, int dstY0, int dstX1, int dstY1,
+      unsigned mask, unsigned filter);
+  virtual void renderbufferStorageMultisampleCHROMIUM(
+      unsigned long target, int samples, unsigned internalformat,
+      unsigned width, unsigned height);
+
   virtual unsigned createCompositorTexture(unsigned width, unsigned height);
   virtual void deleteCompositorTexture(unsigned parent_texture);
   virtual void copyTextureToCompositor(unsigned texture,
                                        unsigned parent_texture);
 
   ggl::Context* context() { return context_; }
 
  private:
   // SwapBuffers callback;
   void OnSwapBuffers();
@@ skipping 20 matching lines @@
   scoped_ptr<uint8> scanline_;
   void FlipVertically(uint8* framebuffer,
                       unsigned int width,
                       unsigned int height);
 #endif
 };
 
 #endif  // defined(ENABLE_GPU)
 #endif  // CHROME_RENDERER_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_