Relanding https://codereview.webrtc.org/1715883002/ in pieces.

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