[ash-md] Makes Ctrl+W accelerator close a selected window in overview mode

tools/metrics/actions/actions.xml

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <!--
 This file is a comprehensive list of Chrome user actions along with the owner
 and description for each user action. A user action should be tied to an actual
 action taken by a user. It should be logged immediately after a user takes the
@@ skipping 14808 matching lines @@
     different from the window that was active prior to entering overview mode.
   </description>
 </action>
 
 <action name="WindowSelector_Overview">
   <owner>tdanderson@chromium.org</owner>
   <owner>flackr@chromium.org</owner>
   <description>Starting the window overview mode.</description>
 </action>
 
+<action name="WindowSelector_OverviewCloseButton">
+  <owner>tdanderson@chromium.org</owner>
+  <owner>varkha@chromium.org</owner>
+  <description>
+    Using the 'X' button to close a window in the overview.
+  </description>
+</action>
+
+<action name="WindowSelector_OverviewCloseKey">
+  <owner>tdanderson@chromium.org</owner>
+  <owner>varkha@chromium.org</owner>
+  <description>
+    Using Ctrl+W shortcut to close a window in the overview.
+  </description>
+</action>
+
 <action name="WindowSelector_OverviewEnterKey">
   <owner>tdanderson@chromium.org</owner>
   <owner>flackr@chromium.org</owner>
   <description>
     Using the enter key to select a window in the overview.
   </description>
 </action>
 
 <action name="WindowSelector_Selection">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
@@ skipping 127 matching lines @@
 <action name="webapps.AddShortcut.Manifest">
   <owner>mlamouri@chromium.org</owner>
   <description>
     Shortcut added to the homescreen with a valid Manifest. This action will be
     recorded in addition to AppShortcut, AppShortcutApple and Bookmark actions
     to keep a trend of whether the webapp also add meta tags.
   </description>
 </action>
 
 </actions>