Expose the capturePicture feature in RenderView for Android WebView legacy API support.

content/renderer/render_widget.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_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 172 matching lines @@
   // the scroll gesture.
   void BeginSmoothScroll(bool scroll_down,
                          const SmoothScrollCompletionCallback& callback,
                          int pixels_to_scroll,
                          int mouse_event_x,
                          int mouse_event_y);
 
   // Close the underlying WebWidget.
   virtual void Close();
 
+  // Notifies about a compositor frame commit operation having finished.
+  virtual void DidCommitCompositorFrame();
+
   float filtered_time_per_frame() const {
     return filtered_time_per_frame_;
   }
 
   enum ShowIme {
     DO_NOT_SHOW_IME,
     SHOW_IME_IF_NEEDED
   };
 
  protected:
@@ skipping 438 matching lines @@
 
   // Specified whether the compositor will run in its own thread.
   bool is_threaded_compositing_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_