Pass MSE media track info from ChunkDemuxer to blink::SourceBuffer

third_party/WebKit/public/platform/WebSourceBufferClient.h

 // Copyright 2014 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 WebSourceBufferClient_h
 #define WebSourceBufferClient_h
 
+#include "WebMediaPlayer.h"
+#include "WebString.h"
+
+#include <tuple>
+#include <vector>
+
 namespace blink {
 
 class WebSourceBufferClient {
 public:
     virtual ~WebSourceBufferClient() { }
 
-    // FIXME: Add a track collection parameter here.
-    virtual void initializationSegmentReceived() = 0;
+    // Complete media track info: track type, bytestream id, kind, label, language.
+    typedef std::tuple<WebMediaPlayer::TrackType, WebString, WebString, WebString, WebString> MediaTrackInfo;
+
+    // Notifies SourceBuffer that parsing of a new init segment has been completed successfully. The input parameter is a collection
+    // of information about media tracks found in the new init segment. The return value is a vector of blink WebMediaPlayer track ids
+    // assigned to each track of the input collection (the order of output track ids must match the input track information).
+    virtual std::vector<WebMediaPlayer::TrackId> initializationSegmentReceived(const std::vector<MediaTrackInfo>& tracks) = 0;
 };
 
 } // namespace blink
 
 #endif // WebSourceBufferClient_h