Generate thumbnails in the browser process.

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2011 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_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 894 matching lines @@
 
   // Helper functions for sending notifications.
   void NotifySwapped();
   void NotifyConnected();
   void NotifyDisconnected();
 
   // If params has a searchable form, this tries to create a new keyword.
   void GenerateKeywordIfNecessary(
       const ViewHostMsg_FrameNavigate_Params& params);
 
+  // Update the thumbnail of the given URL if necessary.
+  void UpdateThumbnailIfNecessary(const GURL& url);
+
   // TabSpecificContentSettings::Delegate implementation.
   virtual void OnContentSettingsAccessed(bool content_was_blocked);
 
   // RenderViewHostDelegate ----------------------------------------------------
 
   // RenderViewHostDelegate::BrowserIntegration implementation.
   virtual void OnUserGesture();
   virtual void OnFindReply(int request_id,
                            int number_of_matches,
                            const gfx::Rect& selection_rect,
@@ skipping 424 matching lines @@
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   // All the IPC message filters for this render view.
   std::vector<IPC::Channel::Listener*> message_filters_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_