Add additional metrics for main intent behaviors.

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 10351 matching lines @@
 <action name="MobileStackViewCloseTab">
   <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="MobileStackViewSwipeCloseTab">
   <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="MobileStartup.MainIntent.NTPCreatedDueToInactivity">
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    An ACTION_MAIN intent was received by Chrome and a NTP was created due to

[Ilya Sherman, 2017/03/28 18:19:54]

nit: s/a NTP/an NTP

[Ted C, 2017/03/28 20:32:22]

Done.

+    the time elapsed since Chrome was last visited.
+  </description>
+</action>
+
 <action name="MobileStartup.MainIntentReceived">
   <owner>tedchoc@chromium.org</owner>
   <description>
     An ACTION_MAIN intent was received by Chrome.  This is the best indicator we
     have to signal the user tapped on the Chrome icon from the launcher.
   </description>
 </action>
 
+<action name="MobileStartup.MainIntentReceived.After12Hours">
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    An ACTION_MAIN intent was received by Chrome after the user had not used
+    Chrome for 12 hours.
+  </description>
+</action>
+
+<action name="MobileStartup.MainIntentReceived.After1Hour">
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    An ACTION_MAIN intent was received by Chrome after the user had not used
+    Chrome for 1 hour.
+  </description>
+</action>
+
+<action name="MobileStartup.MainIntentReceived.After24Hours">
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    An ACTION_MAIN intent was received by Chrome after the user had not used
+    Chrome for 24 hours.
+  </description>
+</action>
+
+<action name="MobileStartup.MainIntentReceived.After6Hours">
+  <owner>tedchoc@chromium.org</owner>
+  <description>
+    An ACTION_MAIN intent was received by Chrome after the user had not used
+    Chrome for 6 hours.

[Ilya Sherman, 2017/03/28 18:19:54]

nit: but fewer than 12 hours (and please document the other metrics in this way
as well)

[Ted C, 2017/03/28 20:32:22]

Done.

+  </description>
+</action>
+
 <action name="MobileTabClobbered">
   <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="MobileTabClosed">
   <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>
 
@@ skipping 6215 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>