Move RtcEventLog object from inside VoiceEngine to Call.

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 c345565b1b7f95d216f72ec6f56d588139bd4211..a0151f8841c876d7b1e6f7df9d92ca9d9db63bdd 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -429,4 +429,12 @@ void FakeCall::SignalNetworkState(webrtc::NetworkState state) {
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
 }
+
+bool FakeCall::StartEventLog(rtc::PlatformFile log_file,
+                             int64_t max_size_bytes) {
+  return false;
+}
+
+void FakeCall::StopEventLog() {}
+
 }  // namespace cricket