Remove old-checkbox-style flag, code and assets

ui/native_theme/native_theme_base.h

Index: ui/native_theme/native_theme_base.h
diff --git a/ui/native_theme/native_theme_base.h b/ui/native_theme/native_theme_base.h
index 633cb46ab82e2363355f235cdef7f31c0896b24e..9e314c333d6bf23329f272f5ad7a011c61c1ca45 100644
--- a/ui/native_theme/native_theme_base.h
+++ b/ui/native_theme/native_theme_base.h
@@ -161,35 +161,14 @@ class NATIVE_THEME_EXPORT NativeThemeBase : public NativeTheme {
                  SkScalar max) const;
   SkColor OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const;
 
-  // Returns whether the new vector-graphics based checkbox and radio button
-  // style is enabled.
-  bool IsNewCheckboxStyleEnabled(SkCanvas* canvas) const;
-
-  // Paint the common parts of the new (experimental) checkboxes and radio
-  // buttons.
+  // Paint the common parts of the checkboxes and radio buttons.
   // borderRadius specifies how rounded the corners should be.
-  SkRect PaintCheckboxRadioNewCommon(
+  SkRect PaintCheckboxRadioCommon(
       SkCanvas* canvas,
       State state,
       const gfx::Rect& rect,
       const SkScalar borderRadius) const;
 
-  // Paint an (experimental) vector-graphics based checkbox on the supplied
-  // canvas at the specified co-ordinates.
-  void PaintCheckboxNew(
-      SkCanvas* canvas,
-      State state,
-      const gfx::Rect& rect,
-      const ButtonExtraParams& button) const;
-
-  // Paint an (experimental) vector-graphics based radio button on the
-  // supplied canbas at the specified co-ordinates.
-  void PaintRadioNew(
-      SkCanvas* canvas,
-      State state,
-      const gfx::Rect& rect,
-      const ButtonExtraParams& button) const;
-
   unsigned int scrollbar_width_;
   unsigned int scrollbar_button_length_;