Add more Rappor metrics

chrome/browser/search_engines/template_url_service.cc

Index: chrome/browser/search_engines/template_url_service.cc
diff --git a/chrome/browser/search_engines/template_url_service.cc b/chrome/browser/search_engines/template_url_service.cc
index aba90a040f65ea7347153f76f70773f690c77c7d..932970036b34988d25baa4f75e34a34e4d0d5c06 100644
--- a/chrome/browser/search_engines/template_url_service.cc
+++ b/chrome/browser/search_engines/template_url_service.cc
@@ -22,6 +22,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/google/google_url_tracker_factory.h"
@@ -43,6 +44,7 @@
 #include "chrome/common/net/url_fixer_upper.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
+#include "components/rappor/rappor_utils.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/common/constants.h"
 #include "net/base/net_util.h"
@@ -969,6 +971,10 @@ void TemplateURLService::OnWebDataServiceRequestDone(
     UMA_HISTOGRAM_ENUMERATION("Search.DefaultSearchProviderType",
         TemplateURLPrepopulateData::GetEngineType(*default_search_provider_),
         SEARCH_ENGINE_MAX);
+    rappor::SampleDomainAndRegistryFromHost(
+        g_browser_process->rappor_service(),
+        "Search.DefaultSearchProvider",
+        default_search_provider_->url_ref().GetHost());
   }
 }