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 a9161fccf87273ba6849d47cc82dfe9844199e0b..455261d9f160b8423e828ae56f5ce87868ffd604 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -33959,6 +33959,27 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.JobControllerSet.CountOfNonPreconnectAltJob"
+    units="alt_jobs">
+  <owner>zhongyi@chromium.org</owner>
+  <summary>This counts number of alternative jobs which are uncleaned.</summary>
+</histogram>
+
+<histogram name="Net.JobControllerSet.CountOfNonPreconnectMainJob"
+    units="main_jobs">
+  <owner>zhongyi@chromium.org</owner>
+  <summary>This counts number of main jobs which are uncleaned.</summary>

[Alexei Svitkine (slow), 2017/03/20 15:51:58]

Please expand these descriptions.

Reading this sentence doesn't make me understand what this is, when this is
logged or what's it about.

[Zhongyi Shi, 2017/03/20 21:26:35]

Done.

+</histogram>
+
+<histogram name="Net.JobControllerSet.CountOfPreconnect"
+    units="job_controllers">
+  <owner>zhongyi@chromium.org</owner>
+  <summary>
+    This counts number of job controllers which are used for preconnect and are
+    uncleaned.
+  </summary>
+</histogram>
+
 <histogram name="Net.LoadPrefetch.Pattern" enum="PrefetchStatus">
   <owner>droger@chromium.org</owner>
   <owner>mattcary@chromium.org</owner>