Add UMA stats for storage manager for Chrome OS.

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 11504 matching lines @@
 <action name="Options_ShowPowerSettings">
   <owner>michaelpg@chromium.org</owner>
   <description>Settings: Manage power</description>
 </action>
 
 <action name="Options_ShowProxySettings">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="Options_ShowStorageManager">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management</description>
+</action>
+
 <action name="Options_ShowSyncAdvanced">
   <owner>stevenjb@chromium.org</owner>
   <description>Settings: Show advanced sync settings</description>
 </action>
 
 <action name="Options_ShowTouchpadSettings">
   <owner>stevenjb@chromium.org</owner>
   <description>Settings: Touchpad settings</description>
 </action>
 
@@ skipping 45 matching lines @@
 <action name="Options_Startup_LastSession">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
 </action>
 
 <action name="Options_Startup_NewTab">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="Options_StorageOpenAccounts">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management: Other users</description>
+</action>
+
+<action name="Options_StorageOpenAndroidStorage">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management: Android storage</description>
+</action>
+
+<action name="Options_StorageOpenClearBrowsingData">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management: Browsing data</description>
+</action>
+
+<action name="Options_StorageOpenClearDriveCache">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management: Offline files</description>
+</action>
+
+<action name="Options_StorageOpenDownloads">
+  <owner>fukino@chromium.org</owner>
+  <description>Settings: Storage management: Downloads</description>
+</action>
+
 <action name="Options_SupervisedUsers_Disable">
   <owner>stevenjb@chromium.org</owner>
   <description>Settings: Users: Disable supervised users</description>
 </action>
 
 <action name="Options_SupervisedUsers_Enable">
   <owner>stevenjb@chromium.org</owner>
   <description>Settings: Users: Enable supervised users</description>
 </action>
 
@@ skipping 3470 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>