[cc] Mailbox Output Surface Support

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/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
@@ skipping 26 matching lines @@
 
 namespace cc {
 
 RendererCapabilities::RendererCapabilities()
     : bestTextureFormat(0)
     , usingPartialSwap(false)
     , usingAcceleratedPainting(false)
     , usingSetVisibility(false)
     , usingSwapCompleteCallback(false)
     , usingGpuMemoryManager(false)
-    , usingDiscardBackbuffer(false)
     , usingEglImage(false)
     , allowPartialTextureUpdates(false)
     , usingOffscreenContext3d(false)
     , maxTextureSize(0)
     , avoidPow2Textures(false)
 {
 }
 
 RendererCapabilities::~RendererCapabilities()
 {
@@ skipping 840 matching lines @@
     for (size_t childIndex = 0; childIndex < layer->children().size(); ++childIndex)
         setAnimationEventsRecursive(events, layer->children()[childIndex].get(), wallClockTime);
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::capturePicture()
 {
     return m_proxy->capturePicture();
 }
 
 }  // namespace cc