Support format using enum argument for Async readback

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 292 matching lines @@
 BackingStore* RenderWidgetHostViewChildFrame::AllocBackingStore(
     const gfx::Size& size) {
   NOTREACHED();
   return NULL;
 }
 
 void RenderWidgetHostViewChildFrame::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& /* dst_size */,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
-    bool readback_config_rgb565) {
+    const SkBitmap::Config config) {
   callback.Run(false, SkBitmap());
 }
 
 void RenderWidgetHostViewChildFrame::CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
       const base::Callback<void(bool)>& callback) {
   NOTIMPLEMENTED();
   callback.Run(false);
 }
@@ skipping 31 matching lines @@
     gfx::NativeViewAccessible accessible_parent) {
 }
 
 gfx::NativeViewId RenderWidgetHostViewChildFrame::GetParentForWindowlessPlugin()
     const {
   return NULL;
 }
 #endif // defined(OS_WIN) && defined(USE_AURA)
 
 }  // namespace content