Log metrics for the new Default Search Engine geolocation setting.

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 31774c7ed82606dfcfe74fdb4a4a19feb94b0f78..3fb586853179c98f7ff8405c69393cfa466d97f9 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -21335,6 +21335,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="GeolocationDisclosure.PostDisclosureDSESetting" enum="Boolean">
+  <owner>benwells@chromium.org</owner>
+  <summary>
+    Records the geolocation default search engine setting after the search
+    geolocation disclosure has been shown and won't be shown again. This metric
+    is only recorded once per client.
+  </summary>
+</histogram>
+
 <histogram name="GeolocationDisclosure.PostDisclosurePermission"
     enum="PermissionStatus">
   <obsolete>
@@ -21358,6 +21367,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="GeolocationDisclosure.PreDisclosureDSESetting" enum="Boolean">
+  <owner>benwells@chromium.org</owner>
+  <summary>
+    Records the geolocation default search engine setting immediately before the
+    search geolocation disclosure has been shown. This metric is only recorded
+    once per client.
+  </summary>
+</histogram>
+
 <histogram name="GeolocationDisclosure.PreDisclosurePermission"
     enum="PermissionStatus">
   <obsolete>