chrome/blink: Add functionality for in-product help for media elements.

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 5236 matching lines @@
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered an event in in-product help.</description>
 </action>
 
 <action name="InProductHelp.NotifyEvent.IPH_IncognitoWindow">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered an event in in-product help.</description>
 </action>
 
+<action name="InProductHelp.NotifyEvent.IPH_MediaDownload">
+  <owner>nyquist@chromium.org</owner>
+  <owner>xingliu@chromium.org</owner>
+  <description>The user triggered an event in in-product help.</description>
+</action>
+
 <action name="InProductHelp.NotifyEvent.IPH_NewTab">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered an event in in-product help.</description>
 </action>
 
 <action name="InProductHelp.NotifyUsedEvent.IPH_DataSaverDetail">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered a used event in in-product help.</description>
@@ skipping 22 matching lines @@
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered a used event in in-product help.</description>
 </action>
 
 <action name="InProductHelp.NotifyUsedEvent.IPH_IncognitoWindow">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered a used event in in-product help.</description>
 </action>
 
+<action name="InProductHelp.NotifyUsedEvent.IPH_MediaDownload">
+  <owner>nyquist@chromium.org</owner>
+  <owner>xingliu@chromium.org</owner>
+  <description>The user triggered a used event in in-product help.</description>
+</action>
+
 <action name="InProductHelp.NotifyUsedEvent.IPH_NewTab">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>The user triggered a used event in in-product help.</description>
 </action>
 
 <action name="InProductHelp.ShouldTriggerHelpUI.IPH_DataSaverDetail">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>
@@ skipping 40 matching lines @@
 
 <action name="InProductHelp.ShouldTriggerHelpUI.IPH_IncognitoWindow">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>
     The feature engagement tracker tried to determine whether in-product help
     should be shown to the user.
   </description>
 </action>
 
+<action name="InProductHelp.ShouldTriggerHelpUI.IPH_MediaDownload">
+  <owner>nyquist@chromium.org</owner>
+  <owner>xingliu@chromium.org</owner>
+  <description>
+    The feature engagement tracker tried to determine whether in-product help
+    should be shown to the user.
+  </description>
+</action>
+
 <action name="InProductHelp.ShouldTriggerHelpUI.IPH_NewTab">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>
     The feature engagement tracker tried to determine whether in-product help
     should be shown to the user.
   </description>
 </action>
 
 <action
@@ skipping 43 matching lines @@
 
 <action
     name="InProductHelp.ShouldTriggerHelpUIResult.NotTriggered.IPH_IncognitoWindow">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>
     A user action that could have triggered In-Product Help did not.
   </description>
 </action>
 
+<action
+    name="InProductHelp.ShouldTriggerHelpUIResult.NotTriggered.IPH_MediaDownload">
+  <owner>nyquist@chromium.org</owner>
+  <owner>xingliu@chromium.org</owner>
+  <description>
+    A user action that could have triggered In-Product Help did not.
+  </description>
+</action>
+
 <action name="InProductHelp.ShouldTriggerHelpUIResult.NotTriggered.IPH_NewTab">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>
     A user action that could have triggered In-Product Help did not.
   </description>
 </action>
 
 <action
     name="InProductHelp.ShouldTriggerHelpUIResult.Triggered.IPH_DataSaverDetail">
@@ skipping 30 matching lines @@
   <description>A user action triggered In-Product Help.</description>
 </action>
 
 <action
     name="InProductHelp.ShouldTriggerHelpUIResult.Triggered.IPH_IncognitoWindow">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>A user action triggered In-Product Help.</description>
 </action>
 
+<action
+    name="InProductHelp.ShouldTriggerHelpUIResult.Triggered.IPH_MediaDownload">
+  <owner>nyquist@chromium.org</owner>
+  <owner>xingliu@chromium.org</owner>
+  <description>A user action triggered In-Product Help.</description>
+</action>
+
 <action name="InProductHelp.ShouldTriggerHelpUIResult.Triggered.IPH_NewTab">
   <owner>nyquist@chromium.org</owner>
   <owner>xingliu@chromium.org</owner>
   <description>A user action triggered In-Product Help.</description>
 </action>
 
 <action name="Indent">
   <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 12325 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>