[Mac] added support for show as tab on popups, similar behavior that exists in windows in which rep…

chrome/browser/ui/cocoa/browser_window_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 
 #include "base/command_line.h"
@@ skipping 1104 matching lines @@
 - (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item {
   SEL action = [item action];
   BOOL enable = NO;
   if (action == @selector(commandDispatch:) ||
       action == @selector(commandDispatchUsingKeyModifiers:)) {
     NSInteger tag = [item tag];
     if (chrome::SupportsCommand(browser_.get(), tag)) {
       // Generate return value (enabled state)
       enable = chrome::IsCommandEnabled(browser_.get(), tag);
       switch (tag) {
+        case IDC_SHOW_AS_TAB:
+          if (NSMenuItem* menuItem = base::mac::ObjCCast<NSMenuItem>(item)) {
+            bool shouldHide = browser_->is_type_tabbed();
+            [menuItem setHidden:shouldHide];
+          }
+          break;
+        case IDC_NEW_TAB:
+          if (NSMenuItem* menuItem = base::mac::ObjCCast<NSMenuItem>(item)) {
+            bool shouldHide = !browser_->is_type_tabbed();
+            [menuItem setHidden:shouldHide];
+          }
+          break;
         case IDC_CLOSE_TAB:
           // Disable "close tab" if the receiving window is not tabbed.
           // We simply check whether the item has a keyboard shortcut set here;
           // app_controller_mac.mm actually determines whether the item should
           // be enabled.
           if (NSMenuItem* menuItem = base::mac::ObjCCast<NSMenuItem>(item))
             enable &= !![[menuItem keyEquivalent] length];
           break;
         case IDC_FULLSCREEN: {
           if (NSMenuItem* menuItem = base::mac::ObjCCast<NSMenuItem>(item)) {
@@ skipping 1137 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)