Media Related changes for TabCapture API

content/public/browser/media_observer.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
 
+#include "content/public/browser/media_request_state.h"
 #include "content/public/common/media_stream_request.h"
 
 namespace media {
 struct MediaLogEvent;
 }
 
 namespace content {
 
 // An embedder may implement MediaObserver and return it from
 // ContentBrowserClient to receive callbacks as media events occur.
@@ skipping 16 matching lines @@
                                       double volume) = 0;
 
   // Called when a MediaEvent occurs.
   virtual void OnMediaEvent(int render_process_id,
                             const media::MediaLogEvent& event) = 0;
 
   // Called when capture devices are opened.
   virtual void OnCaptureDevicesOpened(
       int render_process_id,
       int render_view_id,
-      const content::MediaStreamDevices& devices) = 0;
+      const MediaStreamDevices& devices) = 0;
 
   // Called when the opened capture devices are closed.
   virtual void OnCaptureDevicesClosed(
       int render_process_id,
       int render_view_id,
-      const content::MediaStreamDevices& devices) = 0;
+      const MediaStreamDevices& devices) = 0;
+
+  // Called when a media request changes state.
+  virtual void OnMediaRequestStateChanged(
+      int render_process_id,
+      int render_view_id,
+      const MediaStreamDevice& device,
+      MediaRequestState state) = 0;
 
  protected:
   virtual ~MediaObserver() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_