Adding new SSL Connection Error/Latency metrics

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 262ca22a17dafdaaf988794fe64d9b93b08ab987..851dcda17c74b8b2a23f9aede59a88377bee2330 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -36814,6 +36814,22 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.SSL_Connection_Error_Google" units="NetErrorCodes">
+  <owner>svaldez@chromium.org</owner>
+  <summary>
+    Counts of specific error codes returned when opening an SSL connection for
+    google.com and any subdomain of it.
+  </summary>
+</histogram>
+
+<histogram name="Net.SSL_Connection_Error_TLS13" units="NetErrorCodes">
+  <owner>svaldez@chromium.org</owner>
+  <summary>
+    Counts of specific error codes returned when opening an SSL connection for
+    an endpoint we expect to always offer TLS 1.3.

[davidben, 2017/03/07 19:51:13]

for an endpoint we are using in the initial TLS 1.3 deployment.

+  </summary>
+</histogram>
+
 <histogram name="Net.SSL_Connection_Latency" units="ms">
   <obsolete>
     Replaced by Net.SSL_Connection_Latency_2 on 2014-10-21.
@@ -36929,6 +36945,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.SSL_Connection_Latency_TLS13" units="ms">
+  <owner>svaldez@chromium.org</owner>
+  <summary>
+    Time from when the Connect() starts until it completes for a set of domains
+    that we expect to always offer TLS 1.3.

[davidben, 2017/03/07 19:51:13]

Ditto.

+  </summary>
+</histogram>
+
 <histogram name="Net.SSL_Connection_PostQuantum_Negotiated"
     enum="BooleanSupported">
   <obsolete>