Wire NQE Prefs to Profile

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 2b159ee38b2703c644a8f7218ec1ed0e4e300e8e..29555324f93babe8cb6174f2d9501ae2f21992c6 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -38380,6 +38380,33 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="NQE.Prefs.ReadCount" units="count">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Number of times network quality prefs were read by the network quality
+    estimator.
+  </summary>
+</histogram>
+
+<histogram name="NQE.Prefs.ReadSizeAtStartUp" units="count">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Count of number of network IDs in the prefs read by the network quality
+    estimator at the time of start up.
+  </summary>
+</histogram>
+
+<histogram name="NQE.Prefs.WriteCount" units="count">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Number of times network quality prefs were written by the network quality
+    estimator.
+  </summary>
+</histogram>
+
 <histogram name="NQE.RatioEstimatedToActualRTT" units="100 times">
   <obsolete>
     Replaced in June 2016 by NQE.Accuracy.HttpRTT.* metrics.