Remove PrerenderResourceThrottle and related infrastructure.

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_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 163 matching lines @@
   // finished loading. Only valid if called before MaybeUsePrerenderedPage.
   bool DidPrerenderFinishLoading(const GURL& url) const;
 
   // Maintaining and querying the set of WebContents belonging to this
   // PrerenderManager that are currently showing prerendered pages.
   void MarkWebContentsAsPrerendered(content::WebContents* web_contents);
   void MarkWebContentsAsWouldBePrerendered(content::WebContents* web_contents);
   void MarkWebContentsAsNotPrerendered(content::WebContents* web_contents);
   bool IsWebContentsPrerendered(content::WebContents* web_contents) const;
   bool WouldWebContentsBePrerendered(content::WebContents* web_contents) const;
-  bool IsOldRenderViewHost(
-      const content::RenderViewHost* render_view_host) const;
 
   // Checks whether |url| has been recently navigated to.
   bool HasRecentlyBeenNavigatedTo(const GURL& url);
 
   // Returns true if the method given is invalid for prerendering.
   static bool IsValidHttpMethod(const std::string& method);
 
   // Returns a Value object containing the active pages being prerendered, and
   // a history of pages which were prerendered. The caller is responsible for
   // deleting the return value.
@@ skipping 263 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderManager);
 };
 
 PrerenderManager* FindPrerenderManagerUsingRenderProcessId(
     int render_process_id);
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_