Add missing proxy function for overloaded StartRtcEventLog peer connection function.

TBR=kwiberg@webrtc.org

Bug: webrtc:6463, webrtc:10716
Change-Id: I1cdfb87e30a9aef5ecc297339721397591542646
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/140164
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28164}
diff --git a/api/peer_connection_proxy.h b/api/peer_connection_proxy.h
index 7db41d4b..70bdd11 100644
--- a/api/peer_connection_proxy.h
+++ b/api/peer_connection_proxy.h
@@ -135,6 +135,7 @@
               StartRtcEventLog,
               std::unique_ptr<RtcEventLogOutput>,
               int64_t)
+PROXY_METHOD1(bool, StartRtcEventLog, std::unique_ptr<RtcEventLogOutput>)
 PROXY_METHOD0(void, StopRtcEventLog)
 PROXY_METHOD0(void, Close)
 END_PROXY_MAP()