Emit correct NewTabPage.SuggestionsType metrics

chrome/browser/ui/webui/ntp/ntp_user_data_logger.h

Index: chrome/browser/ui/webui/ntp/ntp_user_data_logger.h
diff --git a/chrome/browser/ui/webui/ntp/ntp_user_data_logger.h b/chrome/browser/ui/webui/ntp/ntp_user_data_logger.h
index a1c749a927627abca2a72581ff3af4eafb52d36c..af3c6f870f1a0d98c82a3729f78bd4d875fdeee5 100644
--- a/chrome/browser/ui/webui/ntp/ntp_user_data_logger.h
+++ b/chrome/browser/ui/webui/ntp/ntp_user_data_logger.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "base/gtest_prod_util.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "chrome/common/ntp_logging_events.h"
@@ -63,6 +64,11 @@ class NTPUserDataLogger
  private:
   friend class content::WebContentsUserData<NTPUserDataLogger>;
 
+  FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
+                           OnMostVisitedItemsChangedFromServer);
+  FRIEND_TEST_ALL_PREFIXES(SearchTabHelperTest,
+                           OnMostVisitedItemsChangedFromClient);
+
   // True if at least one iframe came from a server-side suggestion.
   bool has_server_side_suggestions_;