Implement sequence<MediaStreamTrack> getTracks () This is to conform to the new spec- http://dev.w3…

Source/modules/mediastream/MediaStream.cpp

Index: Source/modules/mediastream/MediaStream.cpp
diff --git a/Source/modules/mediastream/MediaStream.cpp b/Source/modules/mediastream/MediaStream.cpp
index d137f9c4bddc6ba0b019b79ba20362f79d1aa7dd..6c29ed2041dd72c6d6f81f51c3cbe771add0ca15 100644
--- a/Source/modules/mediastream/MediaStream.cpp
+++ b/Source/modules/mediastream/MediaStream.cpp
@@ -158,6 +158,16 @@ bool MediaStream::ended() const
     return m_stopped || m_descriptor->ended();
 }
 
+MediaStreamTrackVector MediaStream::getTracks()
+{
+    MediaStreamTrackVector tracks;
+    for (MediaStreamTrackVector::iterator iter = m_audioTracks.begin(); iter != m_audioTracks.end(); ++iter)
+        tracks.append(iter->get());
+    for (MediaStreamTrackVector::iterator iter = m_videoTracks.begin(); iter != m_videoTracks.end(); ++iter)
+        tracks.append(iter->get());
+    return tracks;
+}
+
 void MediaStream::addTrack(MediaStreamTrack* track, ExceptionState& exceptionState)
 {
     if (ended()) {