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 8ddf95ea8c71cfbf083369e042291f04ff0d513d..fca1d79639e1096bc82854d2df2f47ae2b84ad53 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -17206,6 +17206,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Extensions.Messaging.SetPortIdTime" units="ms">
+  <owner>rdevlin.cronin@chromium.org</owner>
+  <summary>
+    The amount of time for the renderer to inform the browser process of a new
+    port being created with a certain id. This replaces the flow for
+    Extensions.Messaging.GetPortId[A]SyncTime.
+  </summary>
+</histogram>
+
 <histogram name="Extensions.NetworkDelay" units="ms">
   <owner>battre@chromium.org</owner>
   <summary>Time that network requests were blocked due to extensions.</summary>
@@ -108598,6 +108607,7 @@ value.
       label="Created during an event handler for the 'beforeunload' event."/>
   <suffix name="InUnload"
       label="Created during an event handler for the 'unload' event."/>

[Devlin, 2016/12/05 17:09:01]

rkaplow: the above suffixes are no longer being recorded, but the new one is. 
Can we mark suffixes as obsolete?  Or should we just make a new metric, even
though it's conceptually similar?  Or something else?

[rkaplow, 2016/12/05 23:01:15]

yes, you can add obsolete tags to a suffix. See ModuleIntegrityVerificationType
for an example.

[Devlin, 2016/12/08 16:09:44]

Thanks!  Done.

+  <suffix name="Total" label="The total number of ports created."/>
   <affected-histogram name="Extensions.Messaging.ExtensionPortsCreated"/>
 </histogram_suffixes>
 
@@ -108607,6 +108617,7 @@ value.
   <suffix name="Tab" label="A port opened to a tab context."/>
   <affected-histogram name="Extensions.Messaging.GetPortIdAsyncTime"/>
   <affected-histogram name="Extensions.Messaging.GetPortIdSyncTime"/>
+  <affected-histogram name="Extensions.Messaging.SetPortIdTime"/>
 </histogram_suffixes>
 
 <histogram_suffixes name="ExtensionsDatabaseOpen" separator=".">