When HLS redirects are encountered recreate WebMediaPlayer.

third_party/WebKit/public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 182 matching lines @@
     // entering fullscreen, and the WebMediaPlayer is responsible for displaying
     // the video in enteredFullscreen().
     virtual bool supportsOverlayFullscreenVideo() { return false; }
     // Inform WebMediaPlayer when the element has entered/exited fullscreen.
     virtual void enteredFullscreen() { }
     virtual void exitedFullscreen() { }
 
     virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
     // |selectedTrackId| is null if no track is selected.
     virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
+
+    // Non-empty if loading has failed and the WebMediaPlayer has found a better
+    // URL that must be reloaded through the Blink loading process.
+    virtual WebURL alternativeSourceURL() const { return WebURL(); }
 };
 
 } // namespace blink
 
 #endif