Add metrics to all items in the 'wrench' menu

chrome/browser/ui/views/toolbar/wrench_menu.h

Index: chrome/browser/ui/views/toolbar/wrench_menu.h
diff --git a/chrome/browser/ui/views/toolbar/wrench_menu.h b/chrome/browser/ui/views/toolbar/wrench_menu.h
index 267f1deb9f4e4527e01984cc97f94573562aab6d..b115ea94fa4d2f5405c5950fdad3409b2e41b666 100644
--- a/chrome/browser/ui/views/toolbar/wrench_menu.h
+++ b/chrome/browser/ui/views/toolbar/wrench_menu.h
@@ -10,6 +10,8 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
+#include "base/time/time.h"
+#include "base/timer/elapsed_timer.h"
 #include "components/bookmarks/browser/base_bookmark_model_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -184,6 +186,9 @@ class WrenchMenu : public views::MenuDelegate,
 
   ObserverList<WrenchMenuObserver> observer_list_;
 
+  // Timer for menu open metrics.

[Peter Kasting, 2014/11/14 19:48:59]

Nit: This comment adds nothing to the member name.  Remove it or else make much
more detailed.

[edwardjung, 2014/11/17 15:58:24]

Removed.

+  base::ElapsedTimer menu_opened_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(WrenchMenu);
 };