Add a user action for stop in Android.

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 9351 matching lines @@
   <description>User pressed 'Print' in the app menu.</description>
 </action>
 
 <action name="MobileMenuQuit">
   <owner>aurimas@chromium.org</owner>
   <description>User pressed 'Quit' in the app menu.</description>
   <obsolete>This menu item was never added to the app menu.</obsolete>
 </action>
 
 <action name="MobileMenuReload">
-  <owner>aurimas@chromium.org</owner>
-  <description>User pressed 'Reload' in the app menu.</description>
-  <obsolete>This menu item was never added to the app menu.</obsolete>
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    User pressed the reload option in the app menu.  This was added in M55.
+    Prior to M55, the menu reload counts were combined with the toolbar counts,
+    which were all reported as MobileToolbarReload.
+  </description>
 </action>
 
 <action name="MobileMenuRequestDesktopSite">
   <owner>aurimas@chromium.org</owner>
   <description>
     User pressed 'Request Desktop Site' in the app menu.
   </description>
 </action>
 
 <action name="MobileMenuSettings">
   <owner>aurimas@chromium.org</owner>
   <description>User pressed 'Settings' in the app menu.</description>
 </action>
 
 <action name="MobileMenuShare">
   <owner>aurimas@chromium.org</owner>
   <description>User pressed 'Share' in the app menu.</description>
 </action>
 
 <action name="MobileMenuShow">
   <owner>aurimas@chromium.org</owner>
   <description>User opened the app menu.</description>
 </action>
 
+<action name="MobileMenuStop">
+  <owner>tedchoc@chromium.org</owner>
+  <description>User pressed the stop option in the app menu.</description>
+</action>
+
 <action name="MobileNTP.Interests.Click">
   <owner>knn@chromium.org</owner>
   <description>
     Android: The user clicked on an Interest item shown on the NTP.
   </description>
 </action>
 
 <action name="MobileNTP.Interests.Dismissed">
   <owner>knn@chromium.org</owner>
   <description>
@@ skipping 373 matching lines @@
   <description>Please enter the description of this user action.</description>
 </action>
 
 <action name="MobileToolbarNewTab">
   <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 as of 5/2015</obsolete>
 </action>
 
 <action name="MobileToolbarReload">
-  <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
-  <description>Please enter the description of this user action.</description>
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    User pressed the reload icon in the toolbar.  Pre-M55, MobileToolbarReload
+    accounted for all reload actions.  M55+, this metric only refers to reloads
+    that occurred from the toolbar.
+  </description>
 </action>
 
 <action name="MobileToolbarShowMenu">
   <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="MobileToolbarShowStackView">
   <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="MobileToolbarStackViewNewTab">
   <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="MobileToolbarStop">
+  <owner>tedchoc@chromium.org</owner>
+  <description>User pressed the stop icon in the toolbar.</description>
+</action>
+
 <action name="MobileToolbarToggleBookmark">
   <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="MobileUsingMenuByHwButtonDragging">
   <owner>kkimlabs@chromium.org</owner>
   <description>
     Only for Android. Menu is shown by dragging from hardware menu button.
   </description>
@@ skipping 5927 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>