Render inband text tracks in the media pipeline

media/base/mock_demuxer_host.cc

 // Copyright (c) 2011 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 "media/base/mock_demuxer_host.h"
 
 namespace media {
 
 MockDemuxerHost::MockDemuxerHost() {}
 
 MockDemuxerHost::~MockDemuxerHost() {}
 
+void MockDemuxerHost::AddTextStream(DemuxerStream* text_stream,
+                                    TextKind kind,
+                                    const std::string& label,
+                                    const std::string& language) {
+  text_streams_[text_stream] = TextTrackConfig(kind, label, language);
+}
+
+void MockDemuxerHost::RemoveTextStream(DemuxerStream* text_stream) {
+  text_streams_.erase(text_stream);
+}
+
 }  // namespace media