Linux native notifications: Add server capabilities metrics

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index bfb4c9f8318b409301e8d416f3cbe24f677ed5d7..67b7a3ea1589b4184a298fa5ccfcc5658bd9b1e2 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -21230,6 +21230,116 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Freedesktop.Notifications" enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether or not the session has a dbus object at
+    /org/Freedesktop/Notifications with interface org.Freedesktop.Notifications.
+    This indicates whether or not system notifications are supported.  (Linux
+    only) Logged on each start up.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.ActionIcons"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the action-icons capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.Actions"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the actions capability.  (Linux only)
+    Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.Body"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the body capability.  (Linux only)
+    Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.BodyHyperlinks"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the body-hyperlinks capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.BodyImages"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the body-images capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.BodyMarkup"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the body-markup capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.IconMulti"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the icon-multi capability.  (Linux only)
+    Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.IconStatic"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the icon-static capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.Persistence"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>

[Peter Beverloo, 2017/05/02 14:15:24]

nit: it would be nicer if we can define one <histogram> and append the
capabilities as suffices. See <histogram_suffixes>.

[Tom (Use chromium acct), 2017/05/02 18:49:41]

Done.

+  <summary>
+    Whether the notification server has the persistence capability.  (Linux
+    only) Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
+<histogram name="Freedesktop.Notifications.Capabilities.Sound"
+    enum="BooleanSupported">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Whether the notification server has the sound capability.  (Linux only)
+    Logged when the proxy to /org/Freedesktop/Notifications is set up
+    successfully.
+  </summary>
+</histogram>
+
 <histogram name="GCM.AndroidGcmReceiverError" enum="GcmReceiverStatus">
   <obsolete>
     Deprecated as of 01/2016. The error has been fixed by GCM. (crbug/580367)
@@ -25601,6 +25711,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Linux.NativeNotifications.UsingNativeNotifications"
+    enum="BooleanNativeNotifications">
+  <owner>thomasanderson@chromium.org</owner>
+  <summary>
+    Indicates if Chrome is using system notifications or the Chrome notification
+    center. (Linux only) Logged on each start up.
+  </summary>
+</histogram>
+
 <histogram name="Linux.SandboxStatus" enum="LinuxSandboxStatus">
   <owner>rickyz@chromium.org</owner>
   <summary>
@@ -85556,6 +85675,11 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1" label="Missing data in disk cache"/>
 </enum>
 
+<enum name="BooleanNativeNotifications" type="int">
+  <int value="0" label="Using Chrome notifications"/>
+  <int value="1" label="Using native notifications"/>
+</enum>
+
 <enum name="BooleanNavPreloadFinishedFirst" type="int">
   <int value="0" label="Worker preparation finished first"/>
   <int value="1" label="Navigation preload response arrived first"/>