| // Copyright 2013 The Chromium Authors | 
 | // Use of this source code is governed by a BSD-style license that can be | 
 | // found in the LICENSE file. | 
 |  | 
 | #ifndef CONTENT_BROWSER_WEBRTC_WEBRTC_INTERNALS_UI_OBSERVER_H_ | 
 | #define CONTENT_BROWSER_WEBRTC_WEBRTC_INTERNALS_UI_OBSERVER_H_ | 
 |  | 
 | #include <string> | 
 |  | 
 | namespace base { | 
 | class Value; | 
 | }  // namespace base | 
 |  | 
 | namespace content { | 
 |  | 
 | // Implement this interface to receive WebRTCInternals updates. | 
 | class WebRTCInternalsUIObserver { | 
 |  public: | 
 |   virtual ~WebRTCInternalsUIObserver() {} | 
 |  | 
 |   // This is called on the browser IO thread. |event_data| can be NULL if there | 
 |   // are no arguments. | 
 |   virtual void OnUpdate(const std::string& event_name, | 
 |                         const base::Value* event_data) = 0; | 
 | }; | 
 |  | 
 | }  // namespace content | 
 |  | 
 | #endif  // CONTENT_BROWSER_WEBRTC_WEBRTC_INTERNALS_UI_OBSERVER_H_ |