Remove renderer-side tracking of accelerated compositing

content/browser/frame_host/render_widget_host_view_child_frame.cc

 // Copyright 2014 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 "content/browser/frame_host/render_widget_host_view_child_frame.h"
 
 #include "content/browser/frame_host/cross_process_frame_connector.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/view_messages.h"
@@ skipping 187 matching lines @@
 void RenderWidgetHostViewChildFrame::LockCompositingSurface() {
 }
 
 void RenderWidgetHostViewChildFrame::UnlockCompositingSurface() {
 }
 #endif
 
 void RenderWidgetHostViewChildFrame::ScrollOffsetChanged() {
 }
 
-void RenderWidgetHostViewChildFrame::OnAcceleratedCompositingStateChange() {
-}
-
 void RenderWidgetHostViewChildFrame::AcceleratedSurfaceInitialized(int host_id,
                                                               int route_id) {
 }
 
 void RenderWidgetHostViewChildFrame::AcceleratedSurfaceBuffersSwapped(
     const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
     int gpu_host_id) {
   if (frame_connector_)
     frame_connector_->ChildFrameBuffersSwapped(params, gpu_host_id);
 }
@@ skipping 123 matching lines @@
     const {
   return NULL;
 }
 #endif // defined(OS_WIN)
 
 SkBitmap::Config RenderWidgetHostViewChildFrame::PreferredReadbackFormat() {
   return SkBitmap::kARGB_8888_Config;
 }
 
 }  // namespace content