Add a default content setting to the notifications service.

chrome/browser/notifications/desktop_notification_service.h

Index: chrome/browser/notifications/desktop_notification_service.h
diff --git a/chrome/browser/notifications/desktop_notification_service.h b/chrome/browser/notifications/desktop_notification_service.h
index 4b76457a87d753438b1c62f974727a87562d7387..e2be439cbdcbbfbe250a264741ab2ccb68073f3d 100644
--- a/chrome/browser/notifications/desktop_notification_service.h
+++ b/chrome/browser/notifications/desktop_notification_service.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "chrome/browser/notifications/notification.h"
+#include "chrome/common/content_settings.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/notification_service.h"
@@ -85,6 +86,9 @@ class DesktopNotificationService : public NotificationObserver {
   static string16 CreateDataUrl(const GURL& icon_url, const string16& title,
                                 const string16& body);
 
+  ContentSetting GetDefaultContentSetting();
+  void SetDefaultContentSetting(ContentSetting setting);
+
   static void RegisterUserPrefs(PrefService* user_prefs);
  private:
   void InitPrefs();