Remove renderer-side tracking of accelerated compositing

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/basictypes.h"
@@ skipping 1943 matching lines @@
         Source<RenderWidgetHost>(render_widget_host_),
         NotificationService::NoDetails());
   } else {
     DLOG(ERROR) << "Received unexpected frame type.";
     RecordAction(
         base::UserMetricsAction("BadMessageTerminate_UnexpectedFrameType"));
     render_widget_host_->GetProcess()->ReceivedBadMessage();
   }
 }
 
-void RenderWidgetHostViewMac::OnAcceleratedCompositingStateChange() {
-}
-
 void RenderWidgetHostViewMac::AcceleratedSurfaceInitialized(int host_id,
                                                             int route_id) {
 }
 
 void RenderWidgetHostViewMac::GetScreenInfo(blink::WebScreenInfo* results) {
   *results = GetWebScreenInfo(GetNativeView());
 }
 
 gfx::Rect RenderWidgetHostViewMac::GetBoundsInRootWindow() {
   // TODO(shess): In case of !window, the view has been removed from
@@ skipping 2457 matching lines @@
 }
 
 - (void)disableRendering {
   // Disable the fade-out animation as the layer is removed.
   ScopedCAActionDisabler disabler;
   [self removeFromSuperlayer];
   renderWidgetHostView_ = nil;
 }
 
 @end  // implementation SoftwareLayer