Report user actions for interactions with the Windows Settings app.

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 11427b848f9add0eed9a788ee263b42a952a3516..5dc2194806fa46a586db4b9db5f414ff0fcdc914 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -12628,6 +12628,47 @@ should be able to be added at any place in this file.
   </description>
 </action>
 
+<action name="SettingsAppMonitor.AppFocused">
+  <owner>grt@chromium.org</owner>
+  <description>The Windows Settings app became focused.</description>
+</action>
+
+<action name="SettingsAppMonitor.ChooserInvoked">
+  <owner>grt@chromium.org</owner>
+  <description>
+    The user opened the Windows Settings app's browser chooser.
+  </description>
+</action>
+
+<action name="SettingsAppMonitor.ChromeBrowserChosen">
+  <owner>grt@chromium.org</owner>
+  <description>
+    The user selected Chrome from the Windows Settings app's browser chooser.
+  </description>
+</action>
+
+<action name="SettingsAppMonitor.Failed">
+  <owner>grt@chromium.org</owner>
+  <description>
+    The Windows Settings app monitor failed to initialize successfully.

[Alexei Svitkine (slow), 2016/05/24 19:33:38]

Since this doesn't correspond to a user action (something triggered by the
user), I suggest using a histogram to track this case and
SettingsAppMonitor.Initialized. It can be a boolean histogram with those two
options.

The other cases seem fine to use actions for.

[grt (UTC plus 2), 2016/05/25 12:52:47]

I had thought Initialized would be good because it gives a concrete start point
(w/ a timestamp) to the interaction regardless of how it was initiated
(chrome://settings, the default browser infobar, or some other thing).
WDYT of making Failed a BooleanHit histogram but leaving Initialized as-is?

[Alexei Svitkine (slow), 2016/05/25 15:51:34]

OK. Maybe mention that in its description.
A BooleanHit histogram is not great - because you get an absolute number that
won't tell you much w/ out other information (e.g. BooleanHit 38929 - is that a
lot or a little?). I would make it a BooleanSuccess with buckets for success and
failed.

[grt (UTC plus 2), 2016/05/26 13:13:48]

Done.

+  </description>
+</action>
+
+<action name="SettingsAppMonitor.Initialized">
+  <owner>grt@chromium.org</owner>
+  <description>
+    The Windows Settings app monitor initialized successfully.
+  </description>
+</action>
+
+<action name="SettingsAppMonitor.OtherBrowserChosen">
+  <owner>grt@chromium.org</owner>
+  <description>
+    The user selected a different browser from the Windows Settings app's
+    browser chooser.
+  </description>
+</action>
+
 <action name="SettingsResetBubble.LearnMore">
   <owner>mad@chromium.org</owner>
   <description>Please enter the description of this user action.</description>