PrerenderManager: No longer expose weak pointers.

chrome/browser/prerender/prerender_manager.cc

Index: chrome/browser/prerender/prerender_manager.cc
diff --git a/chrome/browser/prerender/prerender_manager.cc b/chrome/browser/prerender/prerender_manager.cc
index 682968aeb11883507ebc21aaf7813ed1d51acadb..10887f9b63b0f5129c56d99a44eed3dfc98d06c1 100644
--- a/chrome/browser/prerender/prerender_manager.cc
+++ b/chrome/browser/prerender/prerender_manager.cc
@@ -157,12 +157,14 @@ struct PrerenderManager::NavigationRecord {
 PrerenderManager::PrerenderManager(Profile* profile)
     : profile_(profile),
       prerender_contents_factory_(PrerenderContents::CreateFactory()),
-      last_prerender_start_time_(GetCurrentTimeTicks() -
+      last_prerender_start_time_(
+          GetCurrentTimeTicks() -
           base::TimeDelta::FromMilliseconds(kMinTimeBetweenPrerendersMs)),
       prerender_history_(new PrerenderHistory(kHistoryLength)),
       histograms_(new PrerenderHistograms()),
       profile_network_bytes_(0),
-      last_recorded_profile_network_bytes_(0) {
+      last_recorded_profile_network_bytes_(0),
+      weak_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   // Certain experiments override our default config_ values.
@@ -1032,7 +1034,8 @@ void PrerenderManager::PeriodicCleanup() {
 void PrerenderManager::PostCleanupTask() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE, base::Bind(&PrerenderManager::PeriodicCleanup, AsWeakPtr()));
+      FROM_HERE, base::Bind(&PrerenderManager::PeriodicCleanup,
+                            weak_factory_.GetWeakPtr()));
 }
 
 base::TimeTicks PrerenderManager::GetExpiryTimeForNewPrerender(