Delete background tab IOSurfaces on Mac.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // 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_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 623 matching lines @@
                      params.route_id, gpu_host_id));
       if (!compositor->HasObserver(this))
         compositor->AddObserver(this);
     }
   }
 }
 
 void RenderWidgetHostViewAura::AcceleratedSurfaceSuspend() {
 }
 
+bool RenderWidgetHostViewAura::HasAcceleratedSurface(
+      const gfx::Size& desired_size) {
+  // TODO(jbates) Implement this so this view can use GetBackingStore for both
+  // software and GPU frames. Defaulting to false just makes GetBackingStore
+  // only useable for software frames.

[piman, 2012/04/19 23:58:18]

FYI... at least on Aura we don't want to block waiting on a composited frame, we
have a separate mechanism to delay the UI compositor until we've received it,
but without blocking the thread.

[jbates, 2012/04/20 01:14:04]

Done.

+  return false;
+}
+
 void RenderWidgetHostViewAura::AcceleratedSurfaceNew(
       int32 width,
       int32 height,
       uint64* surface_handle,
       TransportDIB::Handle* shm_handle) {
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   scoped_refptr<ImageTransportClient> surface(factory->CreateTransportClient(
         gfx::Size(width, height), surface_handle));
   if (!surface) {
     LOG(ERROR) << "Failed to create ImageTransportClient";
@@ skipping 668 matching lines @@
 RenderWidgetHostView* RenderWidgetHostView::CreateViewForWidget(
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void content::RenderWidgetHostViewPort::GetDefaultScreenInfo(
     WebKit::WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }