Move some send stream configuration into webrtc::AudioSendStream.

webrtc/test/mock_voice_engine.h

Index: webrtc/test/mock_voice_engine.h
diff --git a/webrtc/test/mock_voice_engine.h b/webrtc/test/mock_voice_engine.h
index 77b4ec8c012bc3177db51916a18f18f4b32e0d66..dead2260a37625e8a55eeebd468e0d0dc8c20844 100644
--- a/webrtc/test/mock_voice_engine.h
+++ b/webrtc/test/mock_voice_engine.h
@@ -19,7 +19,7 @@ namespace test {
 
 // NOTE: This class inherits from VoiceEngineImpl so that its clients will be
 // able to get the various interfaces as usual, via T::GetInterface().
-class MockVoiceEngine final : public VoiceEngineImpl {
+class MockVoiceEngine : public VoiceEngineImpl {
  public:
   MockVoiceEngine() : VoiceEngineImpl(new Config(), true) {
     // Increase ref count so this object isn't automatically deleted whenever