Devtools: Add metrics for drawer views being shown

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 e7b935b4c0ccf33923941013ea5c91ff2cba7dd4..52130f4a99424cd107b8a3b1e81255408138ae65 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -6842,6 +6842,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Specified DevTools action has been taken.</summary>
 </histogram>
 
+<histogram name="DevTools.DrawerShown" enum="DevToolsDrawer">
+  <owner>sergeyv@chromium.org</owner>
+  <owner>samli@chromium.org</owner>
+  <owner>pfeldman@chromium.org</owner>
+  <summary>Specified DevTools drawer view was shown.</summary>
+</histogram>
+
 <histogram name="DevTools.InspectElement" units="milliseconds">
   <owner>sergeyv@chromium.org</owner>
   <owner>vsevik@chromium.org</owner>
@@ -6854,14 +6861,12 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="DevTools.PanelShown" enum="DevToolsPanel">
   <owner>sergeyv@chromium.org</owner>
-  <owner>vsevik@chromium.org</owner>

[Steven Holte, 2016/01/05 01:24:09]

Is this removal related?

[samli, 2016/01/05 01:38:56]

He's no longer works on Chromium.

   <owner>pfeldman@chromium.org</owner>
   <summary>Specified DevTools panel was shown.</summary>
 </histogram>
 
 <histogram name="DevTools.SettingChanged" enum="DevToolsSetting">
   <owner>sergeyv@chromium.org</owner>
-  <owner>vsevik@chromium.org</owner>
   <owner>pfeldman@chromium.org</owner>
   <summary>Specified DevTools setting was changed.</summary>
 </histogram>
@@ -58916,6 +58921,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="17" label="Resized view in responsive mode"/>
 </enum>
 
+<enum name="DevToolsDrawer" type="int">
+  <int value="1" label="Console"/>
+  <int value="2" label="Animations"/>
+  <int value="3" label="Network config"/>
+  <int value="4" label="Rendering"/>
+  <int value="5" label="Sensors"/>
+  <int value="6" label="Search"/>
+</enum>
+
 <enum name="DevToolsPanel" type="int">
   <int value="1" label="Elements"/>
   <int value="2" label="Resources"/>