MacViews: draw combobox arrow backgrounds

ui/views/controls/combobox/combobox.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_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 105 matching lines @@
 
   // Given bounds within our View, this helper mirrors the bounds if necessary.
   void AdjustBoundsForRTLUI(gfx::Rect* rect) const;
 
   // Draws the selected value of the drop down list
   void PaintText(gfx::Canvas* canvas);
 
   // Draws the button images.
   void PaintButtons(gfx::Canvas* canvas);
 
+  // Draws the arrow background, if used by this platform style.
+  void PaintArrowBackground(gfx::Canvas* canvas);
+
   // Show the drop down list
   void ShowDropDownMenu(ui::MenuSourceType source_type);
 
   // Called when the selection is changed by the user.
   void OnPerformAction();
 
   int GetDisclosureArrowLeftPadding() const;
   int GetDisclosureArrowRightPadding() const;
 
   // Returns the size of the disclosure arrow.
@@ skipping 65 matching lines @@
 
   // Used for making calbacks.
   base::WeakPtrFactory<Combobox> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Combobox);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_COMBOBOX_COMBOBOX_H_