Remove PrerenderManager.enabled_ and related members.

chrome/browser/net/net_pref_observer.cc

Index: chrome/browser/net/net_pref_observer.cc
diff --git a/chrome/browser/net/net_pref_observer.cc b/chrome/browser/net/net_pref_observer.cc
index ad14084cc4776e2f330cf6b839e6f453dc3c02fc..dd4630d3dc34bff66630ed2abbbd4ac6756a5825 100644
--- a/chrome/browser/net/net_pref_observer.cc
+++ b/chrome/browser/net/net_pref_observer.cc
@@ -18,16 +18,13 @@ using content::BrowserThread;
 NetPrefObserver::NetPrefObserver(PrefService* prefs,
                                  prerender::PrerenderManager* prerender_manager,
                                  chrome_browser_net::Predictor* predictor)
-    : prerender_manager_(prerender_manager),
-      predictor_(predictor) {
+    : predictor_(predictor) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(prefs);
   DCHECK(predictor);
 
   base::Closure prefs_callback = base::Bind(&NetPrefObserver::ApplySettings,
                                             base::Unretained(this));
-  network_prediction_enabled_.Init(prefs::kNetworkPredictionEnabled, prefs,
-                                   prefs_callback);
   spdy_disabled_.Init(prefs::kDisableSpdy, prefs, prefs_callback);
 
   ApplySettings();
@@ -40,8 +37,6 @@ NetPrefObserver::~NetPrefObserver() {
 void NetPrefObserver::ApplySettings() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  if (prerender_manager_)
-    prerender_manager_->set_enabled(*network_prediction_enabled_);
   if (spdy_disabled_.IsManaged())
     net::HttpStreamFactory::set_spdy_enabled(!*spdy_disabled_);
 }