MacViews: draw Mac combobox arrows

ui/native_theme/native_theme_win.cc

Index: ui/native_theme/native_theme_win.cc
diff --git a/ui/native_theme/native_theme_win.cc b/ui/native_theme/native_theme_win.cc
index 8539fe663c5596101958d19bfaa0a28bd1c075ad..907dd903193d3832a832222d46c86995546f2e71 100644
--- a/ui/native_theme/native_theme_win.cc
+++ b/ui/native_theme/native_theme_win.cc
@@ -242,9 +242,6 @@ void NativeThemeWin::Paint(SkCanvas* canvas,
     return;
 
   switch (part) {
-    case kComboboxArrow:
-      CommonThemePaintComboboxArrow(canvas, rect);
-      return;
     case kMenuPopupGutter:
       PaintMenuGutter(canvas, rect);
       return;
@@ -464,7 +461,6 @@ void NativeThemeWin::PaintDirect(SkCanvas* canvas,
     case kWindowResizeGripper:
       PaintWindowResizeGripper(hdc, rect);
       return;
-    case kComboboxArrow:
     case kSliderTrack:
     case kSliderThumb:
     case kMaxPart:
@@ -1708,7 +1704,6 @@ NativeThemeWin::ThemeName NativeThemeWin::GetThemeName(Part part) {
       return TEXTFIELD;
     case kWindowResizeGripper:
       return STATUS;
-    case kComboboxArrow:
     case kMenuCheckBackground:
     case kMenuPopupBackground:
     case kMenuItemBackground:
@@ -1754,7 +1749,6 @@ int NativeThemeWin::GetWindowsPart(Part part,
       return SBP_THUMBBTNVERT;
     case kWindowResizeGripper:
       return SP_GRIPPER;
-    case kComboboxArrow:
     case kInnerSpinButton:
     case kMenuList:
     case kMenuCheckBackground:
@@ -1948,7 +1942,6 @@ int NativeThemeWin::GetWindowsState(Part part,
           NOTREACHED();
           return 0;
       }
-    case kComboboxArrow:
     case kInnerSpinButton:
     case kMenuList:
     case kMenuCheckBackground: