[MediaStream API] Allow empty MediaStreams

Source/WebCore/platform/mediastream/MediaStreamDescriptor.h

Index: Source/WebCore/platform/mediastream/MediaStreamDescriptor.h
diff --git a/Source/WebCore/platform/mediastream/MediaStreamDescriptor.h b/Source/WebCore/platform/mediastream/MediaStreamDescriptor.h
index 0ba270b5b50df349880936367807c9cc6f48a65d..b2a22b6eac00ddff050f06cffac031e6a213f4fe 100644
--- a/Source/WebCore/platform/mediastream/MediaStreamDescriptor.h
+++ b/Source/WebCore/platform/mediastream/MediaStreamDescriptor.h
@@ -109,9 +109,6 @@ private:
 
         for (size_t i = 0; i < videoSources.size(); i++)
             m_videoComponents.append(MediaStreamComponent::create(this, videoSources[i]));
-
-        if (!audioSources.size() && !videoSources.size())
-            m_ended = true;
     }
 
     MediaStreamDescriptor(const String& id, const MediaStreamComponentVector& audioComponents, const MediaStreamComponentVector& videoComponents)