In PeerConnectionTestWrapper, put audio input on a separate thread.

talk/app/webrtc/test/peerconnectiontestwrapper.cc

Index: talk/app/webrtc/test/peerconnectiontestwrapper.cc
diff --git a/talk/app/webrtc/test/peerconnectiontestwrapper.cc b/talk/app/webrtc/test/peerconnectiontestwrapper.cc
index aecdcbb52f18baf0a9db0f43c6d575074bec978e..2eb24d9700e0b34420a92c22cb989ff66fbc7202 100644
--- a/talk/app/webrtc/test/peerconnectiontestwrapper.cc
+++ b/talk/app/webrtc/test/peerconnectiontestwrapper.cc
@@ -75,8 +75,7 @@ bool PeerConnectionTestWrapper::CreatePc(
     return false;
   }
 
-  fake_audio_capture_module_ = FakeAudioCaptureModule::Create(
-      rtc::Thread::Current());
+  fake_audio_capture_module_ = FakeAudioCaptureModule::Create();
   if (fake_audio_capture_module_ == NULL) {
     return false;
   }