Fixed crashed when activating the context menu for toolbar buttons using Voiceover

chrome/browser/ui/cocoa/menu_button_unittest.mm

 // Copyright (c) 2012 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.
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/clickhold_button_cell.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/menu_button.h"
 
 @interface MenuButtonTestDelegate : NSObject<NSMenuDelegate> {
@@ skipping 229 matching lines @@
   // Command to open the menu should not be available.
   NSArray* actionNames = [buttonCell accessibilityActionNames];
   EXPECT_FALSE([actionNames containsObject:NSAccessibilityShowMenuAction]);
 
   [button_ setOpenMenuOnRightClick:YES];
 
   // Command to open the menu should now become available.
   actionNames = [buttonCell accessibilityActionNames];
   EXPECT_TRUE([actionNames containsObject:NSAccessibilityShowMenuAction]);
 
+  [button_ setOpenMenuOnClick:NO];
+
+  // Command should still be available, even when both click + hold and right
+  // click are turned on.
+  actionNames = [buttonCell accessibilityActionNames];
+  EXPECT_TRUE([actionNames containsObject:NSAccessibilityShowMenuAction]);
+
   [buttonCell accessibilityPerformAction:NSAccessibilityShowMenuAction];
   EXPECT_TRUE([delegate didOpen]);
   EXPECT_FALSE([delegate isOpen]);
 }
 
 }  // namespace