diff --git a/talk/app/webrtc/peerconnection.cc b/talk/app/webrtc/peerconnection.cc
index c147aef..41df847 100644
--- a/talk/app/webrtc/peerconnection.cc
+++ b/talk/app/webrtc/peerconnection.cc
@@ -712,9 +712,13 @@
   // 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);
     }
   }
 }
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index a3af0e7..ca85338 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -127,12 +127,6 @@
 
 class MetricsObserverInterface : public rtc::RefCountInterface {
  public:
-  // TODO(guoweis): Remove this function once IncrementEnumCounter gets into
-  // chromium. IncrementCounter only deals with one type of enumeration counter,
-  // i.e. PeerConnectionAddressFamilyCounter. Instead of creating a function for
-  // each enum type, IncrementEnumCounter is generalized with the enum type
-  // parameter.
-  virtual void IncrementCounter(PeerConnectionAddressFamilyCounter type) {}
 
   // |type| is the type of the enum counter to be incremented. |counter|
   // is the particular counter in that type. |counter_max| is the next sequence
diff --git a/talk/app/webrtc/webrtcsession.cc b/talk/app/webrtc/webrtcsession.cc
index 838ad93..9102e78 100644
--- a/talk/app/webrtc/webrtcsession.cc
+++ b/talk/app/webrtc/webrtcsession.cc
@@ -2033,18 +2033,11 @@
 
       // Increment the counter for IP type.
       if (local.address().family() == AF_INET) {
-        // TODO(guoweis): Remove this next line once IncrementEnumCounter
-        // implemented for PeerConnectionMetrics.
-        metrics_observer_->IncrementCounter(kBestConnections_IPv4);
-
         metrics_observer_->IncrementEnumCounter(
             kEnumCounterAddressFamily, kBestConnections_IPv4,
             kPeerConnectionAddressFamilyCounter_Max);
 
       } else if (local.address().family() == AF_INET6) {
-        // TODO(guoweis): Remove this next line.
-        metrics_observer_->IncrementCounter(kBestConnections_IPv6);
-
         metrics_observer_->IncrementEnumCounter(
             kEnumCounterAddressFamily, kBestConnections_IPv6,
             kPeerConnectionAddressFamilyCounter_Max);