Adding tools menu responsiveness metric.

ios/chrome/browser/ui/toolbar/toolbar_controller.h

Index: ios/chrome/browser/ui/toolbar/toolbar_controller.h
diff --git a/ios/chrome/browser/ui/toolbar/toolbar_controller.h b/ios/chrome/browser/ui/toolbar/toolbar_controller.h
index eda284ec1bfccd75a9d1089cb44190e73b5e449c..fd9c3889a4b1f572b89f90e29fea2817647a5f3c 100644
--- a/ios/chrome/browser/ui/toolbar/toolbar_controller.h
+++ b/ios/chrome/browser/ui/toolbar/toolbar_controller.h
@@ -23,9 +23,9 @@ class ReadingListModel;
 
 // The time delay before non-initial button images are loaded.
 extern const int64_t kNonInitialImageAdditionDelayNanosec;
-// Notification when the tools menu is opened.
+// Notification that the tools menu has been requested to be shown.
 extern NSString* const kMenuWillShowNotification;
-// Notification when the tools menu is closed.
+// Notification that the tools menu is closed.
 extern NSString* const kMenuWillHideNotification;
 // Accessibility identifier of the toolbar view (for use by integration tests).
 extern NSString* const kToolbarIdentifier;