Delete an obsolete comment on RenderWidgetHost::CopyFromBackingStore.

content/public/browser/render_widget_host.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/keyboard_listener.h"
@@ skipping 147 matching lines @@
   // NotifyTextDirection(). (We may receive keydown events even after we
   // canceled updating the text direction because of auto-repeat.)
   // Note: we cannot undo this change for compatibility with Firefox and IE.
   virtual void UpdateTextDirection(WebKit::WebTextDirection direction) = 0;
   virtual void NotifyTextDirection() = 0;
 
   virtual void Blur() = 0;
 
   // Copies the given subset of the backing store into the given (uninitialized)
   // PlatformCanvas. If |src_rect| is empty, the whole contents is copied.
-  // NOTE: |src_rect| is not supported yet when accelerated compositing is
-  // active (http://crbug.com/118571) and the whole content is always copied
-  // regardless of |src_rect|.
   // If non empty |accelerated_dest_size| is given and accelerated compositing
   // is active, the content is shrinked so that it fits in
   // |accelerated_dest_size|. If |accelerated_dest_size| is larger than the
   // contens size, the content is not resized. If |accelerated_dest_size| is
   // empty, the size copied from the source contents is used.
   // |callback| is invoked with true on success, false otherwise. |output| can
   // be initialized even on failure.
   // NOTE: |callback| is called synchronously if the backing store is available.
   // When accelerated compositing is active, it is called asynchronously on Aura
   // and synchronously on the other platforms.
@@ skipping 98 matching lines @@
   // within content/.  This method is necessary because
   // RenderWidgetHost is the root of a diamond inheritance pattern, so
   // subclasses inherit it virtually, which removes our ability to
   // static_cast to the subclass.
   virtual RenderWidgetHostImpl* AsRenderWidgetHostImpl() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_