Record histograms for on-demand update check results.

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.
 
@@ skipping 11144 matching lines @@
 </action>
 
 <action name="Updater.ServerCertificateFailed">
   <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="UpgradeCheck_AlreadyUpToDate">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="UpgradeCheck_AlreadyUpgraded">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="UpgradeCheck_Done">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Not present in codebase.</obsolete>
 </action>
 
 <action name="UpgradeCheck_Error">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>
+    Removed from codebase; see GoogleUpdate.UpgradeResult,
+    GoogleUpdate.UpdateErrorCode, and GoogleUpdate.ErrorHresult.
+  </obsolete>
 </action>
 
 <action name="UpgradeCheck_Started">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="UpgradeCheck_TimedOut">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Not present in codebase.</obsolete>
 </action>
 
 <action name="UpgradeCheck_UpgradeIsAvailable">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="UpgradeCheck_Upgraded">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="Upgrade_Started">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Removed from codebase; see GoogleUpdate.UpgradeResult.</obsolete>
 </action>
 
 <action name="ViewAboutConflicts">
   <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="ViewAboutFlash">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
@@ skipping 390 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>