Remove straggling bits of listboxes.

sky/engine/public/platform/WebFallbackThemeEngine.h

Index: sky/engine/public/platform/WebFallbackThemeEngine.h
diff --git a/sky/engine/public/platform/WebFallbackThemeEngine.h b/sky/engine/public/platform/WebFallbackThemeEngine.h
index a130e4033d1c4c775da3f1f8e81369a047307b38..753029d2628646b2edc50a4236c8665d30eaf5c7 100644
--- a/sky/engine/public/platform/WebFallbackThemeEngine.h
+++ b/sky/engine/public/platform/WebFallbackThemeEngine.h
@@ -58,7 +58,6 @@ public:
         PartCheckbox,
         PartRadio,
         PartButton,
-        PartTextField,
         PartMenuList,
         PartSliderTrack,
         PartSliderThumb,
@@ -93,13 +92,6 @@ public:
         WebColor backgroundColor;
     };
 
-    // Extra parameters for PartTextField
-    struct TextFieldExtraParams {
-        bool isTextArea;
-        bool isListbox;
-        WebColor backgroundColor;
-    };
-
     // Extra parameters for PartMenuList
     struct MenuListExtraParams {
         bool hasBorder;
@@ -133,7 +125,6 @@ public:
     union ExtraParams {
         ScrollbarTrackExtraParams scrollbarTrack;
         ButtonExtraParams button;
-        TextFieldExtraParams textField;
         MenuListExtraParams menuList;
         SliderExtraParams slider;
         InnerSpinButtonExtraParams innerSpin;