Added Protector backup for Preferences.

chrome/browser/prefs/pref_set_observer.cc

Index: chrome/browser/prefs/pref_set_observer.cc
diff --git a/chrome/browser/prefs/pref_set_observer.cc b/chrome/browser/prefs/pref_set_observer.cc
index 2486621c27681efe2ba1045e509dd234807fdb35..43caccfc68e7b9d9740c538f2468511214610ac7 100644
--- a/chrome/browser/prefs/pref_set_observer.cc
+++ b/chrome/browser/prefs/pref_set_observer.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/prefs/pref_set_observer.h"
 
 #include "chrome/common/pref_names.h"
+#include "chrome/browser/extensions/extension_prefs.h"
 #include "content/public/browser/notification_types.h"
 
 PrefSetObserver::PrefSetObserver(PrefService* pref_service,
@@ -70,6 +71,24 @@ PrefSetObserver* PrefSetObserver::CreateDefaultSearchPrefSetObserver(
   return pref_set;
 }
 
+// static
+PrefSetObserver* PrefSetObserver::CreateProtectedPrefSetObserver(
+    PrefService* pref_service,
+    content::NotificationObserver* observer) {
+  PrefSetObserver* pref_set = new PrefSetObserver(pref_service, observer);
+  // Homepage.
+  pref_set->AddPref(prefs::kHomePageIsNewTabPage);
+  pref_set->AddPref(prefs::kHomePage);
+  pref_set->AddPref(prefs::kShowHomeButton);
+  // Session startup.
+  pref_set->AddPref(prefs::kRestoreOnStartup);
+  pref_set->AddPref(prefs::kURLsToRestoreOnStartup);
+  // Extensions.
+  pref_set->AddPref(ExtensionPrefs::kExtensionsPref);
+
+  return pref_set;
+}
+
 void PrefSetObserver::Observe(int type,
                               const content::NotificationSource& source,
                               const content::NotificationDetails& details) {