[Mac] Show correct cursor after context menu is closed.

chrome/browser/tab_contents/tab_contents_view_mac.mm

 // 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.
 
 #import <Carbon/Carbon.h>
 
 #include "chrome/browser/tab_contents/tab_contents_view_mac.h"
 
 #include <string>
 
@@ skipping 241 matching lines @@
 // iterated past the last focusable element on the page).
 void TabContentsViewMac::TakeFocus(bool reverse) {
   if (reverse) {
     [[cocoa_view_ window] selectPreviousKeyView:cocoa_view_.get()];
   } else {
     [[cocoa_view_ window] selectNextKeyView:cocoa_view_.get()];
   }
 }
 
 void TabContentsViewMac::ShowContextMenu(const ContextMenuParams& params) {
-  RenderViewContextMenuMac menu(tab_contents(),
-                                params,
-                                GetContentNativeView());
-  menu.Init();
+  context_menu_.reset(new RenderViewContextMenuMac(tab_contents(),
+                                                   params,
+                                                   GetContentNativeView()));
+  context_menu_->Init();
 }
 
 // Display a popup menu for WebKit using Cocoa widgets.
 void TabContentsViewMac::ShowPopupMenu(
     const gfx::Rect& bounds,
     int item_height,
     double item_font_size,
     int selected_item,
     const std::vector<WebMenuItem>& items,
     bool right_aligned) {
@@ skipping 268 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self tabContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end