[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 310 matching lines @@
 
   // A RenderWidgetHostViewMac has lifetime scoped to the view. Now that it's
   // properly embedded (or purposely ignored) we can release the retain we took
   // in CreateNewFullscreenWidgetInternal().
   RenderWidgetHostViewMac* widget_view_mac =
       static_cast<RenderWidgetHostViewMac*>(widget_host_view);
   [widget_view_mac->native_view() release];
 }
 
 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 216 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self tabContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end