Expose media controls to accessibility

content/browser/media/session/media_session_impl.h

Index: content/browser/media/session/media_session_impl.h
diff --git a/content/browser/media/session/media_session_impl.h b/content/browser/media/session/media_session_impl.h
index 1f1a0fc85d172fd45655d48251e7ee86ac05bae3..bc253442f941d8732650554cde9b434aa373e57e 100644
--- a/content/browser/media/session/media_session_impl.h
+++ b/content/browser/media/session/media_session_impl.h
@@ -127,6 +127,14 @@ class MediaSessionImpl : public MediaSession,
   // Received a media session action and forward to blink::MediaSession.
   void DidReceiveAction(blink::mojom::MediaSessionAction action) override;
 
+  // Let the media session start ducking such that the volume multiplier is
+  // reduced.
+  CONTENT_EXPORT void StartDucking() override;
+
+  // Let the media session stop ducking such that the volume multiplier is
+  // recovered.
+  CONTENT_EXPORT void StopDucking() override;
+
   // Called when an action is enabled in blink::MediaSession. This method will
   // notify the observers that the action is enabled.
   void OnMediaSessionEnabledAction(blink::mojom::MediaSessionAction action);
@@ -135,14 +143,6 @@ class MediaSessionImpl : public MediaSession,
   // notify the observers that the action is disabled.
   void OnMediaSessionDisabledAction(blink::mojom::MediaSessionAction action);
 
-  // Let the media session start ducking such that the volume multiplier is
-  // reduced.
-  CONTENT_EXPORT void StartDucking();
-
-  // Let the media session stop ducking such that the volume multiplier is
-  // recovered.
-  CONTENT_EXPORT void StopDucking();
-
   // Returns if the session can be controlled by Resume() and Suspend calls
   // above.
   CONTENT_EXPORT bool IsControllable() const;