📰 Add user action for the first time the UI is shown

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 16071 matching lines @@
 </action>
 
 <action name="Suggestions.ContextMenu.Shown">
   <owner>mvanouwerkerk@chromium.org</owner>
   <owner>galinap@google.com</owner>
   <description>
     Android: User opened the context menu on a suggested item.
   </description>
 </action>
 
+<action name="Suggestions.FirstTimeSurfaceVisible">
+  <owner>finkm@chromium.org</owner>
+  <owner>dgn@chromium.org</owner>
+  <description>
+    Recorded right before Suggestions.SurfaceVisible when this is the first time
+    a suggestions surface is made visible to the user on that device.
+  </description>
+</action>
+
 <action name="Suggestions.ScrolledAfterOpen">
   <owner>dgn@chromium.org</owner>
   <owner>finkm@chromium.org</owner>
   <description>
     Android: Recorded the first time the user scrolls after opening the
     suggestions UI.
   </description>
 </action>
 
 <action name="Suggestions.Site.RemovalUndone">
@@ skipping 1134 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>