[Do not commit] Track revocations in content_settings::Observer

chrome/browser/push_messaging/push_messaging_service_impl.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_IMPL_H_
 #define CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_IMPL_H_
 
 #include <stdint.h>
 #include <set>
 #include <vector>
@@ skipping 85 matching lines @@
       const content::PushMessagingService::UnregisterCallback&) override;
   blink::WebPushPermissionStatus GetPermissionStatus(
       const GURL& origin,
       bool user_visible) override;
   bool SupportNonVisibleMessages() override;
 
   // content_settings::Observer implementation.
   void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,
                                const ContentSettingsPattern& secondary_pattern,
                                ContentSettingsType content_type,
+                               ContentSetting previous_value,
                                std::string resource_identifier) override;
 
   // KeyedService implementation.
   void Shutdown() override;
 
   // BackgroundTrigger implementation.
   base::string16 GetName() override;
   gfx::ImageSkia* GetIcon() override;
   void OnMenuClick() override;
 
@@ skipping 119 matching lines @@
   MessageDispatchedCallback message_dispatched_callback_for_testing_;
 
   scoped_ptr<PushMessagingServiceObserver> push_messaging_service_observer_;
 
   base::WeakPtrFactory<PushMessagingServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingServiceImpl);
 };
 
 #endif  // CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_IMPL_H_