Revert of - Clean up unused voice engine DTMF code.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index 3277e75a6412c0de2e70450cc9828b299e97836a..aa94d48dfbf7e256b19a761d80dfc947e2440132 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -39,8 +39,8 @@
   return latest_telephone_event_;
 }
 
-bool FakeAudioSendStream::SendTelephoneEvent(int payload_type, int event,
-                                             int duration_ms) {
+bool FakeAudioSendStream::SendTelephoneEvent(int payload_type, uint8_t event,
+                                             uint32_t duration_ms) {
   latest_telephone_event_.payload_type = payload_type;
   latest_telephone_event_.event_code = event;
   latest_telephone_event_.duration_ms = duration_ms;