Add a preference for disabling vibration in notifications.

chrome/browser/notifications/platform_notification_service_impl.h

Index: chrome/browser/notifications/platform_notification_service_impl.h
diff --git a/chrome/browser/notifications/platform_notification_service_impl.h b/chrome/browser/notifications/platform_notification_service_impl.h
index 90793ee52e94607a295d0ccdc970fefbbc78c71b..773476e6e8da7a78cf817890a6621d8ae9639e0d 100644
--- a/chrome/browser/notifications/platform_notification_service_impl.h
+++ b/chrome/browser/notifications/platform_notification_service_impl.h
@@ -35,6 +35,10 @@ namespace gcm {
 class PushMessagingBrowserTest;
 }
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
 // The platform notification service is the profile-agnostic entry point through
 // which Web Notifications can be controlled.
 class PlatformNotificationServiceImpl
@@ -47,6 +51,9 @@ class PlatformNotificationServiceImpl
     NOTIFICATION_SETTINGS
   };
 
+  // Register profile-specific prefs.
+  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
   // Returns the active instance of the service in the browser process. Safe to
   // be called from any thread.
   static PlatformNotificationServiceImpl* GetInstance();