Remove PrefService::ScheduleSavePersistentPrefs and SavePersistentPrefs.

chrome/browser/extensions/extension_updater.cc

Index: chrome/browser/extensions/extension_updater.cc
diff --git a/chrome/browser/extensions/extension_updater.cc b/chrome/browser/extensions/extension_updater.cc
index 86bf800923766317ddcbedbcdd51d92c8dff1100..667ad19adc487447510f4c11044227a1b40fdff9 100644
--- a/chrome/browser/extensions/extension_updater.cc
+++ b/chrome/browser/extensions/extension_updater.cc
@@ -830,7 +830,6 @@ void ExtensionUpdater::ProcessBlacklist(const std::string& data) {
   // Update the pref value for blacklist version
   prefs_->SetString(kExtensionBlacklistUpdateVersion,
                     current_extension_fetch_.version);
-  prefs_->ScheduleSavePersistentPrefs();
 }
 
 void ExtensionUpdater::OnCRXFetchComplete(
@@ -959,7 +958,6 @@ void ExtensionUpdater::ScheduleNextCheck(const TimeDelta& target_delay) {
   // Save the time of next check.
   Time next = Time::Now() + actual_delay;
   prefs_->SetInt64(kNextExtensionsUpdateCheck, next.ToInternalValue());
-  prefs_->ScheduleSavePersistentPrefs();
 
   timer_.Start(FROM_HERE, actual_delay, this, &ExtensionUpdater::TimerFired);
 }