The UMA stat for the Wrench menu was only firing when Alt+F was pressed, not ...

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
===================================================================
--- chrome/browser/ui/browser.cc	(revision 70876)
+++ chrome/browser/ui/browser.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -1738,7 +1738,7 @@
 }
 
 void Browser::ShowAppMenu() {
-  UserMetrics::RecordAction(UserMetricsAction("ShowAppMenu"), profile_);
+  // We record the user metric for this event in WrenchMenu::RunMenu.
   window_->ShowAppMenu();
 }