MacViews: draw Mac combobox arrows

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 26 matching lines @@
 // drawn correctly, and this information is given to the Paint() method via the
 // ExtraParams union.  Each part that requires more information has its own
 // field in the union.
 //
 // NativeTheme also supports getting the default size of a given part with
 // the GetPartSize() method.
 class NATIVE_THEME_EXPORT NativeTheme {
  public:
   // The part to be painted / sized.
   enum Part {
-    kComboboxArrow,
     kCheckbox,
     kInnerSpinButton,
     kMenuList,
     kMenuPopupBackground,
 #if defined(OS_WIN)
     kMenuCheck,
     kMenuCheckBackground,
     kMenuPopupArrow,
     kMenuPopupGutter,
     kMenuPopupSeparator,
@@ skipping 320 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_