Remove dead histograms and actions

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 8993 matching lines @@
 <action name="MoveWordRight">
   <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="NPAPIRemovalInfobar.LearnMore">
   <owner>wfh@chromium.org</owner>
   <description>
     Recorded when the NPAPI removal infobar link is clicked.
   </description>
+  <obsolete>Deprecated due to NPAPI removal.</obsolete>
 </action>
 
 <action name="NPAPIRemovalInfobar.Shown">
   <owner>wfh@chromium.org</owner>
   <description>Recorded when the NPAPI removal infobar is shown.</description>
+  <obsolete>Deprecated due to NPAPI removal.</obsolete>
 </action>
 
 <action name="NTPPromoClosed">
   <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="NTPPromoShown">
   <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 2636 matching lines @@
 </action>
 
 <action name="PluginContextMenu_RotateCounterclockwise">
   <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="PluginLoaderPosix.LaunchUtilityProcess">
   <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>Deprecated due to NPAPI removal.</obsolete>
 </action>
 
 <action name="PluginLoaderPosix.UtilityProcessCrashed">
   <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>Deprecated due to NPAPI removal.</obsolete>
 </action>
 
 <action name="Plugin_200ForByteRange">
   <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="Plugin_Blocked">
   <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 32 matching lines @@
 </action>
 
 <action name="Plugin_Load_UI">
   <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="Plugin_NPAPINotSupported">
   <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>Deprecated due to NPAPI removal.</obsolete>
 </action>
 
 <action name="Precache.Fetch.IntentReceived" not_user_triggered="true">
   <owner>twifkak@chromium.org</owner>
   <owner>bengr@chromium.org</owner>
   <description>
     An intent was received by PrecacheServiceLauncher, corresponding either to a
     change in power or network, or to an alarm set by the
     PrecacheServiceLauncher itself.
   </description>
@@ skipping 2421 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>