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 cb5a22c353dc48c7af68706e9ee22d107526f85a..60687d3d8ff20063f7c2f566279e2267d824d31f 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -38549,6 +38549,33 @@ 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 the network quality prefs were read by the network quality
+    estimator.
+  </summary>
+</histogram>
+
+<histogram name="NQE.Prefs.ReadSize" units="count">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Count of the number of network IDs in the prefs read by the network quality
+    estimator.
+  </summary>
+</histogram>
+
+<histogram name="NQE.Prefs.WriteCount" units="count">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Number of times the 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.