Record how often we end up in Chrome from external navigations.

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 8727 matching lines @@
   <description>Please enter the description of this user action.</description>
   <obsolete>Deprecated as of 8/2015</obsolete>
 </action>
 
 <action name="MobileContextMenuViewImage">
   <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 8/2015</obsolete>
 </action>
 
+<action name="MobileExternalNavigationDispatched">
+  <owner>mariakhomenko@chromium.org</owner>
+  <description>
+    Records when the system started a VIEW intent on a navigation click. This
+    happens when there is another application in the system that's not a browser
+    and that can handle this URL (e.g. Maps app for  http://maps.google.com/
+    url).
+  </description>
+</action>
+
+<action name="MobileExternalNavigationReceived">
+  <owner>mariakhomenko@chromium.org</owner>
+  <description>
+    Records  when a user was given a choice between using Chrome and an

[Ilya Sherman, 2016/06/29 22:25:30]

nit: s/Records  when/Records when

+    installed app and chose Chrome.
+  </description>
+</action>
+
 <action name="MobileFirstEditInOmnibox">
   <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 12/2015</obsolete>
 </action>
 
 <action name="MobileFocusedFakeboxOnNtp">
   <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 12/2015</obsolete>
@@ skipping 6104 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>