kiosk: Add kiosk launch type UMA

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 87051080d7ba4c8c09251e4b3b28eac4f62c4ecf..583bda281713c608afc12003c254eb6a6574700a 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -18103,6 +18103,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Kiosk.LaunchType" enum="KioskLaunchType">
+  <owner>xiyuan@chromium.org</owner>
+  <owner>blumberg@chromium.org</owner>
+  <summary>
+    Records kiosk launches, whether it is an enterprise or consumer kiosk and
+    whether it is an auto launch or manual launch.
+  </summary>
+</histogram>
+
 <histogram name="LanguageUsage.AcceptLanguage" enum="LanguageCode">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>Accept languages.</summary>
@@ -71141,6 +71150,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="3" label="Migration failed twice"/>
 </enum>
 
+<enum name="KioskLaunchType" type="int">
+  <int value="0" label="Enterprise auto launch"/>
+  <int value="1" label="Enterprise manual launch"/>
+  <int value="2" label="Consumer auto launch"/>
+  <int value="3" label="Consumer manual launch"/>
+</enum>
+
 <enum name="LanguageCode" type="int">
   <summary>ISO 639 Language Codes.</summary>
   <int value="24929" label="Afar"/>