Add the SetMediaKeys handler to pass a drm bridge to a MediaSourcePlayer

media/base/android/media_player_android.h

Index: media/base/android/media_player_android.h
diff --git a/media/base/android/media_player_android.h b/media/base/android/media_player_android.h
index 1310fbdea2af2a0286e66ff6eae56ec659cfe50e..0b31ea2d95a9e4dba386d274f5d862e50120f8a8 100644
--- a/media/base/android/media_player_android.h
+++ b/media/base/android/media_player_android.h
@@ -17,6 +17,7 @@
 
 namespace media {
 
+class MediaDrmBridge;
 class MediaPlayerManager;
 
 // This class serves as the base class for different media player
@@ -99,6 +100,9 @@ class MEDIA_EXPORT MediaPlayerAndroid {
   // Called when the demuxer has changed the duration.
   virtual void DurationChanged(const base::TimeDelta& duration);
 
+  // Pass a drm bridge to a player.
+  virtual void SetDrmBridge(MediaDrmBridge* drm_bridge);
+
   int player_id() { return player_id_; }
 
  protected: