When HLS redirects are encountered recreate WebMediaPlayer.

media/blink/webmediaplayer_impl.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 MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 205 matching lines @@
   };
 
   // Playback state variables computed together in UpdatePlayState().
   // (Public for testing.)
   struct PlayState {
     DelegateState delegate_state;
     bool is_memory_reporting_enabled;
     bool is_suspended;
   };
 
+  blink::WebURL alternativeSourceURL() const override;
+
  private:
   friend class WebMediaPlayerImplTest;
 
   void OnPipelineSuspended();
   void OnDemuxerOpened();
 
   // Pipeline::Client overrides.
   void OnError(PipelineStatus status) override;
   void OnEnded() override;
   void OnMetadata(PipelineMetadata metadata) override;
@@ skipping 269 matching lines @@
   // OnSuspendRequested() is called. If the state is UNKNOWN, the current frame
   // from the compositor will be queried to see if suspend is supported; the
   // state will be set to YES or NO respectively if a frame is available.
   enum class CanSuspendState { UNKNOWN, YES, NO };
   CanSuspendState can_suspend_state_;
 
   // Called some-time after OnHidden() if the media was suspended in a playing
   // state as part of the call to OnHidden().
   base::OneShotTimer background_pause_timer_;
 
+  GURL alternative_source_url_;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_