Remove PrefObserver usage, batch 9.

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 e985609039ee1781b4dc55a821d4e5e3967c0a3c..7517323ac9a7bd8e2729a244c48f55cbb328e263 100644
--- a/chrome/browser/net/net_pref_observer.cc
+++ b/chrome/browser/net/net_pref_observer.cc
@@ -23,9 +23,11 @@ NetPrefObserver::NetPrefObserver(PrefService* prefs,
   DCHECK(prefs);
   DCHECK(predictor);
 
+  base::Closure prefs_callback = base::Bind(&NetPrefObserver::ApplySettings,
+                                            base::Unretained(this));
   network_prediction_enabled_.Init(prefs::kNetworkPredictionEnabled, prefs,
-                                   this);
-  spdy_disabled_.Init(prefs::kDisableSpdy, prefs, this);
+                                   prefs_callback);
+  spdy_disabled_.Init(prefs::kDisableSpdy, prefs, prefs_callback);
 
   ApplySettings();
 }
@@ -34,11 +36,6 @@ NetPrefObserver::~NetPrefObserver() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
-void NetPrefObserver::OnPreferenceChanged(PrefServiceBase* service,
-                                          const std::string& pref_name) {
-  ApplySettings();
-}
-
 void NetPrefObserver::ApplySettings() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));