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 258c01d17d5ca3dc5dc3fc6479deb91ac7ac62d2..2e3a1873a26a7bba70a9a465160bc89ff6ec8eed 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -66906,6 +66906,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="WebRTC.PeerConnection.DtlsHandshakeError"
+    enum="DtlsHandshakeError">
+  <owner>zhihuang@chromium.org</owner>
+  <summary>
+    Records the error whenever the Dtls handshake fails. There are only two
+    types of errors, incompatitable cipher suite and unknown error, for now.
+  </summary>
+</histogram>
+
 <histogram name="WebRTC.PeerConnection.IPMetrics" enum="PeerConnectionCounters">
   <owner>mallinath@chromium.org</owner>
   <summary>
@@ -75061,6 +75070,11 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="6" label="SRTP_NULL_SHA1_32"/>
 </enum>
 
+<enum name="DtlsHandshakeError" type="int">
+  <int value="0" label="Incompatible cipher suite"/>
+  <int value="1" label="Unknown error"/>
+</enum>
+
 <enum name="DumpOutcome" type="int">
   <int value="0" label="Success"/>
   <int value="1" label="Failure"/>