Revert of [NoStatePrefetch] Kill renderer after preload scanning

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 <stdint.h>
 
 #include <memory>
@@ skipping 250 matching lines @@
   // but not yet deleted.
   PrerenderContents* GetPrerenderContents(
       const content::WebContents* web_contents) const;
 
   // Returns the PrerenderContents object for a given child_id, route_id pair,
   // otherwise returns NULL. Note that the PrerenderContents may have been
   // Destroy()ed, but not yet deleted.
   virtual PrerenderContents* GetPrerenderContentsForRoute(
       int child_id, int route_id) const;
 
-  // Returns the PrerenderContents object that is found in active prerenders to
-  // match the |render_process_id|. Otherwise returns a nullptr.
-  PrerenderContents* GetPrerenderContentsForProcess(
-      int render_process_id) const;
-
   // Returns a list of all WebContents being prerendered.
   std::vector<content::WebContents*> GetAllPrerenderingContents() const;
 
   // Checks whether |url| has been recently navigated to.
   bool HasRecentlyBeenNavigatedTo(Origin origin, const GURL& url);
 
   // Returns true iff the scheme of the URL given is valid for prerendering.
   static bool DoesURLHaveValidScheme(const GURL& url);
 
   // Returns true iff the scheme of the subresource URL given is valid for
@@ skipping 327 matching lines @@
   std::unique_ptr<TimeOverride> time_override_;
 
   base::WeakPtrFactory<PrerenderManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderManager);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_MANAGER_H_