Rename discardFramebufferEXT to discardBackbufferCHROMIUM to avoid collision with real discardFrame…

cc/layer_tree_host.cc

 // Copyright 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.
 
 #include "cc/layer_tree_host.h"
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
@@ skipping 134 matching lines @@
 {
 }
 
 RendererCapabilities::RendererCapabilities()
     : bestTextureFormat(0)
     , usingPartialSwap(false)
     , usingAcceleratedPainting(false)
     , usingSetVisibility(false)
     , usingSwapCompleteCallback(false)
     , usingGpuMemoryManager(false)
-    , usingDiscardFramebuffer(false)
+    , usingDiscardBackbuffer(false)
     , usingEglImage(false)
     , allowPartialTextureUpdates(false)
     , maxTextureSize(0)
 {
 }
 
 RendererCapabilities::~RendererCapabilities()
 {
 }
 
@@ skipping 809 matching lines @@
 
 void LayerTreeHost::UnregisterAnimationController(LayerAnimationController* controller) {
 #if !defined(NDEBUG)
     if (ContainsKey(m_allAnimationControllers, controller))
         m_allAnimationControllers.erase(controller);
 #endif
     DidDeactivateAnimationController(controller);
 }
 
 }  // namespace cc