Add MediaStream.active attribute

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 7d5caddfc43eeb992c04365b18a6fafb8fda69d2..e62f9de2023942f095aca3c134168dfec9caf49a 100644
--- a/Source/modules/mediastream/MediaStream.cpp
+++ b/Source/modules/mediastream/MediaStream.cpp
@@ -117,6 +117,9 @@ MediaStream::MediaStream(ExecutionContext* context, PassRefPtr<MediaStreamDescri
         newTrack->registerMediaStream(this);
         m_videoTracks.append(newTrack);
     }
+
+    if (emptyOrOnlyEndedTracks())
+        m_descriptor->setEnded();
 }
 
 MediaStream::MediaStream(ExecutionContext* context, const MediaStreamTrackVector& audioTracks, const MediaStreamTrackVector& videoTracks)
@@ -143,6 +146,8 @@ MediaStream::MediaStream(ExecutionContext* context, const MediaStreamTrackVector
 
     m_audioTracks = audioTracks;
     m_videoTracks = videoTracks;
+    if (emptyOrOnlyEndedTracks())
+        m_descriptor->setEnded();
 }
 
 MediaStream::~MediaStream()
@@ -150,6 +155,20 @@ MediaStream::~MediaStream()
     m_descriptor->setClient(0);
 }
 
+bool MediaStream::emptyOrOnlyEndedTracks()
+{
+    if (!m_audioTracks.size() && !m_videoTracks.size()) {
+        return true;
+    }
+    for (MediaStreamTrackVector::iterator iter = m_audioTracks.begin(); iter !=

[perkj_chrome, 2015/01/07 14:12:17]

?

+        if (!iter->get()->ended())
+            return false;
+    for (MediaStreamTrackVector::iterator iter = m_videoTracks.begin(); iter !=
+        if (!iter->get()->ended())
+            return false;
+    return true;
+}
+
 bool MediaStream::ended() const
 {
     return m_stopped || m_descriptor->ended();
@@ -224,7 +243,7 @@ void MediaStream::removeTrack(MediaStreamTrack* track, ExceptionState& exception
     track->unregisterMediaStream(this);
     m_descriptor->removeComponent(track->component());
 
-    if (!m_audioTracks.size() && !m_videoTracks.size())
+    if (emptyOrOnlyEndedTracks())
         m_descriptor->setEnded();
 
     MediaStreamCenter::instance().didRemoveMediaStreamTrack(m_descriptor.get(), track->component());