Cleanup: Remove duplicated functions

talk/app/webrtc/peerconnection.cc

Index: talk/app/webrtc/peerconnection.cc
diff --git a/talk/app/webrtc/peerconnection.cc b/talk/app/webrtc/peerconnection.cc
index c147aef5651f8f994b0b2c2726db497228a0f650..41df847cd68ddaa344c703def4549aa3ed81701d 100644
--- a/talk/app/webrtc/peerconnection.cc
+++ b/talk/app/webrtc/peerconnection.cc
@@ -712,9 +712,13 @@ void PeerConnection::RegisterUMAObserver(UMAObserver* observer) {
   // Send information about IPv4/IPv6 status.
   if (uma_observer_ && port_allocator_) {
     if (port_allocator_->flags() & cricket::PORTALLOCATOR_ENABLE_IPV6) {
-      uma_observer_->IncrementCounter(kPeerConnection_IPv6);
+      uma_observer_->IncrementEnumCounter(
+          kEnumCounterAddressFamily, kPeerConnection_IPv6,
+          kPeerConnectionAddressFamilyCounter_Max);
     } else {
-      uma_observer_->IncrementCounter(kPeerConnection_IPv4);
+      uma_observer_->IncrementEnumCounter(
+          kEnumCounterAddressFamily, kPeerConnection_IPv4,
+          kPeerConnectionAddressFamilyCounter_Max);
     }
   }
 }