UMA data collection for docked windows

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 46dfdbd12ad10177bf3c4cd38f7dcd07bba606f8..4990377ea4fbf69fe5feed3b7d9bf63136333977 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -202,6 +202,31 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="Ash.Dock.Actions">

[flackr, 2013/10/29 21:33:49]

enum="..." with descriptions for each enum value?
See
https://code.google.com/p/chromium/codesearch#chromium/src/tools/metrics/hist...

[varkha, 2013/10/30 19:21:00]

Done.

+  <summary>
+    User-initiated action taken after dragging a window when docking is enabled.
+  </summary>
+</histogram>
+
+<histogram name="Ash.Dock.Items">
+  <summary>
+    Maximum number of items (windows or panels) that have been docked during a
+    session (recorded at the end of the session).
+  </summary>
+</histogram>
+
+<histogram name="Ash.Dock.TimeBetweenUse" units="seconds">
+  <summary>
+    The amount of time between instances of docking or undocking a window.
+  </summary>
+</histogram>
+
+<histogram name="Ash.Dock.Width" units="pixels">
+  <summary>
+    Width of the docked area in pixels. Recorded every time it changes.
+  </summary>
+</histogram>
+
 <histogram name="Ash.GestureCreated" enum="UIEventType">
   <summary>
     The gesture-events recognized and dispatched by the browser gesture