Generate thumbnails in the browser process.

chrome/renderer/render_widget.h

 // Copyright (c) 2009 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 CHROME_RENDERER_RENDER_WIDGET_H_
 #define CHROME_RENDERER_RENDER_WIDGET_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 201 matching lines @@
   // given output parameters.
   //
   // A return value of null means optimized painting can not be used and we
   // should continue with the normal painting code path.
   virtual webkit::ppapi::PluginInstance* GetBitmapForOptimizedPluginPaint(
       const gfx::Rect& paint_bounds,
       TransportDIB** dib,
       gfx::Rect* location,
       gfx::Rect* clip);
 
+  // Gets the scroll offset of this widget, if this widget has a notion of
+  // scroll offset.
+  virtual gfx::Size GetScrollOffset();
+
   // Sets the "hidden" state of this widget.  All accesses to is_hidden_ should
   // use this method so that we can properly inform the RenderThread of our
   // state.
   void SetHidden(bool hidden);
 
   bool is_hidden() const { return is_hidden_; }
 
   // True if an UpdateRect_ACK message is pending.
   bool update_reply_pending() const {
     return update_reply_pending_;
@@ skipping 129 matching lines @@
   bool suppress_next_char_events_;
 
   // Set to true if painting to the window is handled by the accelerated
   // compositor.
   bool is_accelerated_compositing_active_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 #endif  // CHROME_RENDERER_RENDER_WIDGET_H_