Wiring Libjingle network related metrics into Chrome

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 59fabd637c9b86147b3e5715b9fd6f2b9a5e5952..a881d0dd3c0909cb0d6d5424a65ba91a845e7277 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -31125,6 +31125,33 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="WebRTC.PeerConnectionIPMetrics" enum="PeerConnectionCounters">
+  <owner>mallinath@chromium.org</owner>
+  <summary>
+    Counters on IPv4 and IPv6 usage in PeerConnection. These values logged once

[Alexei Svitkine (slow), 2014/05/20 06:40:20]

Nit: "are logged"

+    per PeerConnection.
+  </summary>
+</histogram>
+
+<histogram name="WebRTC.PeerConnectionIPv4Interfaces">
+  <owner>mallinath@chromium.org</owner>
+  <summary>
+    Number of IPv4 network interfaces discovered in a PeerConnection Session.

[Alexei Svitkine (slow), 2014/05/20 06:40:20]

Mention that this is logged once per PeerConnection? (Or if not, how
often/when?) Same for below.

+  </summary>
+</histogram>
+
+<histogram name="WebRTC.PeerConnectionIPv6Interfaces">
+  <owner>mallinath@chromium.org</owner>
+  <summary>
+    Number of IPv6 network interfaces discovered in a PeerConnection Session.
+  </summary>
+</histogram>
+
+<histogram name="WebRTC.PeerConnectionTimeToConnect" units="milliseconds">
+  <owner>mallinath@chromium.org</owner>
+  <summary>Time to setup a peer to peer call with PeerConnection.</summary>
+</histogram>
+
 <histogram name="WebRTC.ReceivedAudioTrackDuration" units="milliseconds">
   <owner>perkj@chromium.org</owner>
   <summary>
@@ -39804,6 +39831,13 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="6" label="Clicked 'Enable password manager'"/>
 </enum>
 
+<enum name="PeerConnectionCounters" type="int">
+  <int value="0" label="PeerConnection enabled with IPv4."/>
+  <int value="1" label="PeerConnection enabled with Ipv6."/>
+  <int value="2" label="IPv4 BestConnection."/>
+  <int value="3" label="IPv6 BestConnection."/>
+</enum>
+
 <enum name="PepperInterface" type="int">
 <!-- Generated by ppapi/tools/pepper_hash_for_uma.cc -->