Rename discardFramebufferEXT to discardBackbufferCHROMIUM to avoid collision with real discardFrame…

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h

 // Copyright (c) 2012 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_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 498 matching lines @@
       WGC3Denum format,
       WGC3Denum type,
       WGC3Denum access);
   virtual void unmapTexSubImage2DCHROMIUM(const void*);
 
   virtual void setVisibilityCHROMIUM(bool visible);
 
   virtual void discardFramebufferEXT(WGC3Denum target,
                                      WGC3Dsizei numAttachments,
                                      const WGC3Denum* attachments);
-  virtual void ensureFramebufferCHROMIUM();
+  virtual void discardBackbufferCHROMIUM();
+  virtual void ensureBackbufferCHROMIUM();
 
   virtual void setMemoryAllocationChangedCallbackCHROMIUM(
       WebGraphicsMemoryAllocationChangedCallbackCHROMIUM* callback);
 
   virtual void sendManagedMemoryStatsCHROMIUM(
       const WebGraphicsManagedMemoryStats* stats);
 
   virtual void copyTextureToParentTextureCHROMIUM(
       WebGLId texture, WebGLId parentTexture);
 
@@ skipping 230 matching lines @@
   gpu::gles2::GLES2Implementation* gl_;
   Error last_error_;
   int frame_number_;
   bool bind_generates_resources_;
   bool use_echo_for_swap_ack_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_