Native themes: Add MenuItemSubtitleColor

ui/native_theme/native_theme_mac.mm

 // Copyright (c) 2013 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 "ui/native_theme/native_theme_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
 #include "base/mac/mac_util.h"
@@ skipping 129 matching lines @@
       return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
     case kColorId_SelectedMenuItemForegroundColor:
       return NSSystemColorToSkColor([NSColor selectedMenuItemTextColor]);
     case kColorId_FocusedMenuItemBackgroundColor:
       return NSSystemColorToSkColor([NSColor selectedMenuItemColor]);
     case kColorId_MenuBackgroundColor:
       return kMenuPopupBackgroundColor;
     case kColorId_MenuSeparatorColor:
       return base::mac::IsOS10_9() ? kMenuSeparatorColorMavericks
                                    : kMenuSeparatorColor;
+    case kColorId_MenuItemSubtitleColor:
+      return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
     case kColorId_MenuBorderColor:
       return kMenuBorderColor;
 
     // Mac has a different "pressed button" styling because it doesn't use
     // ripples.
     case kColorId_ButtonPressedShade:
       return SkColorSetA(SK_ColorBLACK, 0x10);
 
     // There's a system setting General > Highlight color which sets the
     // background color for text selections. We honor that setting.
@@ skipping 274 matching lines @@
   canvas->drawDRRect(outer_shape, shape, paint);
 }
 
 NativeThemeMac::NativeThemeMac() {
 }
 
 NativeThemeMac::~NativeThemeMac() {
 }
 
 }  // namespace ui