[NoStatePrefetch] Add performance histograms.

chrome/browser/prerender/prerender_contents.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_contents.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <functional>
@@ skipping 215 matching lines @@
 // static
 PrerenderContents::Factory* PrerenderContents::CreateFactory() {
   return new PrerenderContentsFactoryImpl();
 }
 
 // static
 PrerenderContents* PrerenderContents::FromWebContents(
     content::WebContents* web_contents) {
   if (!web_contents)
     return NULL;
-  PrerenderManager* prerender_manager = PrerenderManagerFactory::GetForProfile(
-      Profile::FromBrowserContext(web_contents->GetBrowserContext()));
+  PrerenderManager* prerender_manager =
+      PrerenderManagerFactory::GetForBrowserContext(
+          web_contents->GetBrowserContext());
   if (!prerender_manager)
     return NULL;
   return prerender_manager->GetPrerenderContents(web_contents);
 }
 
 void PrerenderContents::StartPrerendering(
     const gfx::Rect& bounds,
     SessionStorageNamespace* session_storage_namespace) {
   DCHECK(profile_);
   DCHECK(!bounds.IsEmpty());
@@ skipping 476 matching lines @@
 void PrerenderContents::AddResourceThrottle(
     const base::WeakPtr<PrerenderResourceThrottle>& throttle) {
   resource_throttles_.push_back(throttle);
 }
 
 void PrerenderContents::AddNetworkBytes(int64_t bytes) {
   network_bytes_ += bytes;
 }
 
 }  // namespace prerender