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

tools/metrics/actions/actions.xml

Index: tools/metrics/actions/actions.xml
diff --git a/tools/metrics/actions/actions.xml b/tools/metrics/actions/actions.xml
index 14c92ac0aedc0ca36fd0a194d19480e5506b9f8a..857e6df916638dd427ec8d821fdfc25cc337ce92 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -5254,6 +5254,12 @@ should be able to be added at any place in this file.
   <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>
@@ -5296,6 +5302,12 @@ should be able to be added at any place in this file.
   <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>
@@ -5356,6 +5368,15 @@ should be able to be added at any place in this file.
   </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>
@@ -5419,6 +5440,15 @@ should be able to be added at any place in this file.
   </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>
@@ -5469,6 +5499,13 @@ should be able to be added at any place in this file.
   <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>