Clean up NativeTheme (particularly CommonTheme).

ui/native_theme/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_NATIVE_THEME_NATIVE_THEME_H_
 #define UI_NATIVE_THEME_NATIVE_THEME_H_
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "build/build_config.h"
@@ skipping 235 matching lines @@
   enum ColorId {
     // Windows
     kColorId_WindowBackground,
     // Dialogs
     kColorId_DialogBackground,
     kColorId_BubbleBackground,
     // FocusableBorder
     kColorId_FocusedBorderColor,
     kColorId_UnfocusedBorderColor,
     // Button
-    kColorId_ButtonBackgroundColor,
     kColorId_ButtonEnabledColor,
     kColorId_ButtonDisabledColor,
-    kColorId_ButtonHighlightColor,
     kColorId_ButtonHoverColor,
-    kColorId_ButtonHoverBackgroundColor,
     kColorId_ButtonPressedShade,
     kColorId_BlueButtonEnabledColor,
     kColorId_BlueButtonDisabledColor,
     kColorId_BlueButtonPressedColor,
     kColorId_BlueButtonHoverColor,
     kColorId_BlueButtonShadowColor,
     kColorId_ProminentButtonColor,
     kColorId_TextOnProminentButtonColor,
     // MenuItem
     kColorId_EnabledMenuItemForegroundColor,
     kColorId_DisabledMenuItemForegroundColor,
-    kColorId_DisabledEmphasizedMenuItemForegroundColor,
     kColorId_SelectedMenuItemForegroundColor,
     kColorId_FocusedMenuItemBackgroundColor,
-    kColorId_HoverMenuItemBackgroundColor,
     kColorId_MenuSeparatorColor,
     kColorId_MenuBackgroundColor,
     kColorId_MenuBorderColor,
     // MenuButton - buttons in wrench menu
     kColorId_EnabledMenuButtonBorderColor,
     kColorId_FocusedMenuButtonBorderColor,
     kColorId_HoverMenuButtonBorderColor,
     // Label
     kColorId_LabelEnabledColor,
     kColorId_LabelDisabledColor,
-    kColorId_LabelBackgroundColor,
     // Link
     kColorId_LinkDisabled,
     kColorId_LinkEnabled,
     kColorId_LinkPressed,
     // Textfield
     kColorId_TextfieldDefaultColor,
     kColorId_TextfieldDefaultBackground,
     kColorId_TextfieldReadOnlyColor,
     kColorId_TextfieldReadOnlyBackground,
     kColorId_TextfieldSelectionColor,
@@ skipping 82 matching lines @@
  private:
   // Observers to notify when the native theme changes.
   base::ObserverList<NativeThemeObserver> native_theme_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTheme);
 };
 
 }  // namespace ui
 
 #endif  // UI_NATIVE_THEME_NATIVE_THEME_H_