Expose media controls to accessibility

content/browser/media/session/media_session_impl.h

 // Copyright 2015 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_BROWSER_MEDIA_SESSION_MEDIA_SESSION_IMPL_H_
 #define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_IMPL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 114 matching lines @@
   // Suspend the media session.
   // |type| represents the origin of the request.
   CONTENT_EXPORT void Suspend(MediaSession::SuspendType suspend_type) override;
 
   // Stop the media session.
   // |type| represents the origin of the request.
   CONTENT_EXPORT void Stop(MediaSession::SuspendType suspend_type) override;
 
   // Let the media session start ducking such that the volume multiplier is
   // reduced.
-  CONTENT_EXPORT void StartDucking();
+  CONTENT_EXPORT void StartDucking() override;
 
   // Let the media session stop ducking such that the volume multiplier is
   // recovered.
-  CONTENT_EXPORT void StopDucking();
+  CONTENT_EXPORT void StopDucking() override;
 
   // Returns if the session can be controlled by Resume() and Suspend calls
   // above.
   CONTENT_EXPORT bool IsControllable() const;
 
   // Returns if the session is currently active.
   CONTENT_EXPORT bool IsActive() const;
 
   // Returns if the session is currently suspended.
   // TODO(mlamouri): IsSuspended() below checks if the state is not ACTIVE
@@ skipping 157 matching lines @@
   ServicesMap services_;
   // The currently routed service (non-owned pointer).
   MediaSessionServiceImpl* routed_service_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSessionImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_IMPL_H_