Make TaskManagerTabContentsResource explicitly handle prerendering and instant pages.

chrome/browser/prerender/prerender_manager.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 CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 177 matching lines @@
   // parameter which, if a prerender is found, is set to the Origin of the
   // prerender |web_contents|.
   bool IsWebContentsPrerendering(content::WebContents* web_contents,
                                  Origin* origin) const;
 
   // Returns the PrerenderContents object for the given web_contents if it's
   // used for an active prerender page, otherwise returns NULL.
   PrerenderContents* GetPrerenderContents(
       content::WebContents* web_contents) const;
 
+  // Returns a list of all WebContents being prerendered.
+  const std::vector<content::WebContents*> GetAllPrerenderingContents() const;
+
   // Maintaining and querying the set of WebContents belonging to this
   // PrerenderManager that are currently showing prerendered pages.
   void MarkWebContentsAsPrerendered(content::WebContents* web_contents,
                                     Origin origin);
   void MarkWebContentsAsWouldBePrerendered(content::WebContents* web_contents,
                                            Origin origin);
   void MarkWebContentsAsNotPrerendered(content::WebContents* web_contents);
 
   // Returns true if |web_contents| was originally a prerender that has since
   // been swapped in. The optional parameter |origin| is an output parameter
@@ skipping 368 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderManager);
 };
 
 PrerenderManager* FindPrerenderManagerUsingRenderProcessId(
     int render_process_id);
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_