Index: ui/native_theme/native_theme_aura.cc |
diff --git a/ui/native_theme/native_theme_aura.cc b/ui/native_theme/native_theme_aura.cc |
index 0c3255cb18b6749ccadab206376634289dce1b76..4b12db1a68a7e0dffcd63b14661465a5b5f3944b 100644 |
--- a/ui/native_theme/native_theme_aura.cc |
+++ b/ui/native_theme/native_theme_aura.cc |
@@ -317,4 +317,27 @@ gfx::Size NativeThemeAura::GetPartSize(Part part, |
return NativeThemeBase::GetPartSize(part, state, extra); |
} |
+bool NativeThemeAura::SupportsNinePatch(Part part) const { |
+ if (!IsOverlayScrollbarEnabled()) |
+ return false; |
+ |
+ return part == kScrollbarHorizontalThumb || part == kScrollbarVerticalThumb; |
+} |
+ |
+gfx::Size NativeThemeAura::GetNinePatchCanvasSize(Part part) const { |
+ DCHECK(SupportsNinePatch(part)); |
+ |
+ // 2 pixel border with 1 pixel center patch. |
+ return gfx::Size(5, 5); |
+} |
+ |
+gfx::Rect NativeThemeAura::GetNinePatchAperture(Part part) const { |
+ DCHECK(SupportsNinePatch(part)); |
+ |
+ // The aperture is a single pixel surrounded by a non-resizing 2 pixel border. |
+ // The stroke is actually only 1 pixel wide but we need to use 2 pixels so |
+ // that the center patch doesn't try to blend colors between patches. |
+ return gfx::Rect(2, 2, 1, 1); |
+} |
+ |
} // namespace ui |