Index: third_party/WebKit/Source/platform/scroll/ScrollbarTheme.h |
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarTheme.h b/third_party/WebKit/Source/platform/scroll/ScrollbarTheme.h |
index ec03635f57af4bed02a460181197917342f0556c..9036cd211c60ce237be323a8fb6cae8f09117c0f 100644 |
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarTheme.h |
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarTheme.h |
@@ -59,6 +59,8 @@ class PLATFORM_EXPORT ScrollbarTheme { |
virtual ScrollbarPart hitTest(const ScrollbarThemeClient&, const IntPoint&); |
// This returns a fixed value regardless of device-scale-factor. |
+ // This returns thickness when scrollbar is painted. i.e. It's not 0 even in |
+ // overlay scrollbar mode. |
// See also Scrollbar::scrollbarThickness(). |
virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar) { |
return 0; |