Make all the menu UI consitent with the new chromeos menu spec.

ui/gfx/native_theme.h

 // Copyright (c) 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.
 
 #ifndef UI_GFX_NATIVE_THEME_H_
 #define UI_GFX_NATIVE_THEME_H_
 #pragma once
 
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/ui_export.h"
@@ skipping 213 matching lines @@
     // TextButton
     kColorId_TextButtonBackgroundColor,
     kColorId_TextButtonEnabledColor,
     kColorId_TextButtonDisabledColor,
     kColorId_TextButtonHighlightColor,
     kColorId_TextButtonHoverColor,
     // MenuItem
     kColorId_EnabledMenuItemForegroundColor,
     kColorId_DisabledMenuItemForegroundColor,
     kColorId_FocusedMenuItemBackgroundColor,
+    // Label
+    kColorId_LabelEnabledColor,
+    kColorId_LabelDisabledColor,
+    kColorId_LabelBackgroundColor,
     // Textfield
     kColorId_TextfieldDefaultColor,
     kColorId_TextfieldDefaultBackground,
     kColorId_TextfieldSelectionColor,
     kColorId_TextfieldSelectionBackgroundFocused,
     kColorId_TextfieldSelectionBackgroundUnfocused,
     // TODO(benrg): move other hardcoded colors here.
   };
 
   // Return a color from the system theme.
@@ skipping 13 matching lines @@
   static unsigned int thumb_inactive_color_;
   static unsigned int thumb_active_color_;
   static unsigned int track_color_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTheme);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_THEME_H_