Media indicator for background recording task

ash/media_delegate.h

 // Copyright 2013 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 ASH_MEDIA_DELEGATE_H_
 #define ASH_MEDIA_DELEGATE_H_
 
+namespace content {
+class BrowserContext;
+}
+
 namespace ash {
 
+enum MediaCaptureState {
+  MEDIA_CAPTURE_NONE = 0,
+  MEDIA_CAPTURE_AUDIO = 1 << 0,
+  MEDIA_CAPTURE_VIDEO = 1 << 1,
+  MEDIA_CAPTURE_AUDIO_VIDEO = MEDIA_CAPTURE_AUDIO | MEDIA_CAPTURE_VIDEO,
+};
+
 // A delegate class to control media playback.
 class MediaDelegate {
  public:
   virtual ~MediaDelegate() {}
 
   // Handles the Next Track Media shortcut key.
   virtual void HandleMediaNextTrack() = 0;
 
   // Handles the Play/Pause Toggle Media shortcut key.
   virtual void HandleMediaPlayPause() = 0;
 
   // Handles the Previous Track Media shortcut key.
   virtual void HandleMediaPrevTrack() = 0;
+
+  // Returns the current media recording state of web contents
+  // that belongs to the |context|.
+  virtual MediaCaptureState GetMediaCaptureState(
+      content::BrowserContext* context) = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_MEDIA_DELEGATE_H_