Enable seek in fullscreen mode for MSE impl on android

webkit/media/android/media_source_delegate.h

 // Copyright (c) 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 WEBKIT_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_
 #define WEBKIT_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 57 matching lines @@
       size_t key_length,
       const unsigned char* init_data,
       size_t init_data_length,
       const WebKit::WebString& session_id);
   WebKit::WebMediaPlayer::MediaKeyException CancelKeyRequest(
       const WebKit::WebString& key_system,
       const WebKit::WebString& session_id);
 
   void Seek(base::TimeDelta time);
 
+  void CancelPendingSeek();
+
   // Called when DemuxerStreamPlayer needs to read data from ChunkDemuxer.
   // If it's the first request after the seek, |seek_done| will be true.
   void OnReadFromDemuxer(media::DemuxerStream::Type type, bool seek_done);
 
  private:
   // Methods inherited from DemuxerHost.
   virtual void SetTotalBytes(int64 total_bytes) OVERRIDE;
   virtual void AddBufferedByteRange(int64 start, int64 end) OVERRIDE;
   virtual void AddBufferedTimeRange(base::TimeDelta start,
                                     base::TimeDelta end) OVERRIDE;
@@ skipping 69 matching lines @@
   scoped_ptr<media::MediaPlayerHostMsg_ReadFromDemuxerAck_Params> video_params_;
 
   bool seeking_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourceDelegate);
 };
 
 }  // namespace webkit_media
 #endif  // WEBKIT_MEDIA_ANDROID_MEDIA_SOURCE_DELEGATE_H_