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

chrome/browser/ui/cocoa/clickhold_button_cell.mm

 // Copyright (c) 2009 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.
 
 #import "chrome/browser/ui/cocoa/clickhold_button_cell.h"
 
 #include "base/logging.h"
 
 // Minimum and maximum click-hold timeout.
 static const NSTimeInterval kMinTimeout = 0.0;
@@ skipping 11 matching lines @@
 
 @implementation ClickHoldButtonCell
 
 @synthesize enableClickHold = enableClickHold_;
 @synthesize enableRightClick = enableRightClick_;
 @synthesize clickHoldTimeout = clickHoldTimeout_;
 @synthesize trackOnlyInRect = trackOnlyInRect_;
 @synthesize activateOnDrag = activateOnDrag_;
 @synthesize clickHoldTarget = clickHoldTarget_;
 @synthesize clickHoldAction = clickHoldAction_;
+@synthesize accessibilityShowMenuTarget = accessibilityShowMenuTarget_;
+@synthesize accessibilityShowMenuAction = accessibilityShowMenuAction_;
 
 // Overrides:
 
 + (BOOL)prefersTrackingUntilMouseUp {
   return NO;
 }
 
 - (id)init {
   if ((self = [super init]))
     [self resetToDefaults];
@@ skipping 16 matching lines @@
   if ((self = [super initTextCell:string]))
     [self resetToDefaults];
   return self;
 }
 
 - (void)accessibilityPerformAction:(NSString*)action {
   if ([action isEqualToString:NSAccessibilityShowMenuAction] &&
       [self shouldExposeAccessibilityShowMenu]) {
     NSControl* controlView = static_cast<NSControl*>([self controlView]);
     if (controlView)
-      [controlView sendAction:clickHoldAction_ to:clickHoldTarget_];
+      [controlView sendAction:accessibilityShowMenuAction_
+                           to:accessibilityShowMenuTarget_];
     return;
   }
 
   [super accessibilityPerformAction:action];
 }
 
 - (BOOL)startTrackingAt:(NSPoint)startPoint
                  inView:(NSView*)controlView {
   return enableClickHold_ ? YES :
                             [super startTrackingAt:startPoint
@@ skipping 127 matching lines @@
 // which relies on the "published" defaults.
 - (void)resetToDefaults {
   [self setEnableClickHold:NO];
   [self setClickHoldTimeout:0.25];
   [self setTrackOnlyInRect:NO];
   [self setActivateOnDrag:YES];
 }
 
 - (BOOL)shouldExposeAccessibilityShowMenu {
   return (enableRightClick_ || (enableClickHold_ && clickHoldTimeout_ > 0.0)) &&
-      clickHoldAction_ && clickHoldTarget_;
+      accessibilityShowMenuAction_ && accessibilityShowMenuTarget_;
 }
 
 @end  // @implementation ClickHoldButtonCell (Private)