Enable seek in fullscreen mode for MSE impl on android

webkit/media/android/media_source_delegate.cc

 // 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.
 
 #include "webkit/media/android/media_source_delegate.h"
 
 #include "base/message_loop_proxy.h"
 #include "base/strings/string_number_conversions.h"
 #include "media/base/android/demuxer_stream_player_params.h"
 #include "media/base/bind_to_loop.h"
@@ skipping 190 matching lines @@
 void MediaSourceDelegate::Seek(base::TimeDelta time) {
   seeking_ = true;
   DCHECK(chunk_demuxer_);
   if (!chunk_demuxer_)
     return;
   chunk_demuxer_->StartWaitingForSeek();
   chunk_demuxer_->Seek(time,
       BIND_TO_RENDER_LOOP(&MediaSourceDelegate::OnDemuxerError));
 }
 
+void MediaSourceDelegate::CancelPendingSeek() {
+  if (chunk_demuxer_)
+    chunk_demuxer_->CancelPendingSeek();
+}
+
 void MediaSourceDelegate::SetTotalBytes(int64 total_bytes) {
   NOTIMPLEMENTED();
 }
 
 void MediaSourceDelegate::AddBufferedByteRange(int64 start, int64 end) {
   NOTIMPLEMENTED();
 }
 
 void MediaSourceDelegate::AddBufferedTimeRange(base::TimeDelta start,
                                                base::TimeDelta end) {
@@ skipping 238 matching lines @@
 void MediaSourceDelegate::OnDecryptorReady(media::Decryptor* decryptor) {}
 
 scoped_ptr<media::TextTrack> MediaSourceDelegate::OnAddTextTrack(
     media::TextKind kind,
     const std::string& label,
     const std::string& language) {
   return scoped_ptr<media::TextTrack>();
 }
 
 }  // namespace webkit_media