Remove VoEFile from VoeWrapper and the remaining places in libjingle where it was being used.

talk/media/webrtc/webrtcvoiceengine.cc

Index: talk/media/webrtc/webrtcvoiceengine.cc
diff --git a/talk/media/webrtc/webrtcvoiceengine.cc b/talk/media/webrtc/webrtcvoiceengine.cc
index 358645d853f5e07ee5a5eb303e9e8fef9928cd6c..6157b22c713774835177e2577f7e965788b1dd35 100644
--- a/talk/media/webrtc/webrtcvoiceengine.cc
+++ b/talk/media/webrtc/webrtcvoiceengine.cc
@@ -2308,11 +2308,6 @@ bool WebRtcVoiceMediaChannel::ChangeSend(int channel, SendFlags send) {
       LOG_RTCERR1(StartSend, channel);
       return false;
     }
-    if (engine()->voe()->file() &&
-        engine()->voe()->file()->StopPlayingFileAsMicrophone(channel) == -1) {
-      LOG_RTCERR1(StopPlayingFileAsMicrophone, channel);
-      return false;
-    }
   } else {  // SEND_NOTHING
     RTC_DCHECK(send == SEND_NOTHING);
     if (engine()->voe()->base()->StopSend(channel) == -1) {