Revert of [NoStatePrefetch] Kill renderer after preload scanning

chrome/browser/prerender/prerender_manager.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <functional>
@@ skipping 698 matching lines @@
   return nullptr;
 }
 
 PrerenderContents* PrerenderManager::GetPrerenderContentsForRoute(
     int child_id,
     int route_id) const {
   WebContents* web_contents = tab_util::GetWebContentsByID(child_id, route_id);
   return web_contents ? GetPrerenderContents(web_contents) : nullptr;
 }
 
-PrerenderContents* PrerenderManager::GetPrerenderContentsForProcess(
-    int render_process_id) const {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  for (auto& prerender_data : active_prerenders_) {
-    PrerenderContents* prerender_contents = prerender_data->contents();
-    if (prerender_contents->GetRenderViewHost()->GetProcess()->GetID() ==
-        render_process_id) {
-      return prerender_contents;
-    }
-  }
-  return nullptr;
-}
-
 std::vector<WebContents*> PrerenderManager::GetAllPrerenderingContents() const {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   std::vector<WebContents*> result;
 
   for (const auto& prerender : active_prerenders_) {
     WebContents* contents = prerender->contents()->prerender_contents();
     if (contents &&
         prerender->contents()->prerender_mode() == FULL_PRERENDER) {
       result.push_back(contents);
     }
@@ skipping 648 matching lines @@
   DCHECK_EQ(1u, erased);
 }
 
 void PrerenderManager::SetPrerenderContentsFactoryForTest(
     PrerenderContents::Factory* prerender_contents_factory) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   prerender_contents_factory_.reset(prerender_contents_factory);
 }
 
 }  // namespace prerender