Add RGB565 Texture readback support in gl_helper

content/browser/renderer_host/render_widget_host_view_win.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_win.h"
 
 #include <InputScope.h>
 #include <wtsapi32.h>
 #pragma comment(lib, "wtsapi32.lib")
 
@@ skipping 842 matching lines @@
 }
 
 BackingStore* RenderWidgetHostViewWin::AllocBackingStore(
     const gfx::Size& size) {
   return new BackingStoreWin(render_widget_host_, size);
 }
 
 void RenderWidgetHostViewWin::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
-    const base::Callback<void(bool, const SkBitmap&)>& callback) {
+    const base::Callback<void(bool, const SkBitmap&)>& callback,
+    bool readback_config_rgb565) {
+  if (readback_config_rgb565) {
+    NOTIMPLEMENTED();
+    callback.Run(false, SkBitmap());
+  }
   base::ScopedClosureRunner scoped_callback_runner(
       base::Bind(callback, false, SkBitmap()));
   if (!accelerated_surface_)
     return;
 
   if (dst_size.IsEmpty() || src_subrect.IsEmpty())
     return;
 
   ignore_result(scoped_callback_runner.Release());
   accelerated_surface_->AsyncCopyTo(src_subrect, dst_size, callback);
@@ skipping 2339 matching lines @@
   return new RenderWidgetHostViewWin(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(
       blink::WebScreenInfo* results) {
   GetScreenInfoForWindow(0, results);
 }
 
 }  // namespace content