Move getUserMedia finish to "when audio track configured".

content/renderer/media/media_stream_audio_source.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 CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 64 matching lines @@
 
   // Returns true if the source of audio is local to the application (e.g.,
   // microphone input or loopback audio capture) as opposed to audio being
   // streamed-in from outside the application.
   bool is_local_source() const { return is_local_source_; }
 
   // Connects this source to the given |track|, creating the appropriate
   // implementation of the content::MediaStreamAudioTrack interface, which
   // becomes associated with and owned by |track|. Returns true if the source
   // was successfully started.
-  bool ConnectToTrack(const blink::WebMediaStreamTrack& track);
+  virtual bool ConnectToTrack(const blink::WebMediaStreamTrack& track);
 
   // Returns the current format of the audio passing through this source to the
   // sinks. This can return invalid parameters if the source has not yet been
   // started. This method is thread-safe.
   media::AudioParameters GetAudioParameters() const;
 
   // Returns a unique class identifier. Some subclasses override and use this
   // method to provide safe down-casting to their type.
   virtual void* GetClassIdentifier() const;
 
@@ skipping 63 matching lines @@
   // Provides weak pointers so that MediaStreamAudioTracks won't call
   // StopAudioDeliveryTo() if this instance dies first.
   base::WeakPtrFactory<MediaStreamAudioSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_SOURCE_H_