Improving the appearance of overlay scrollbars

ui/views/controls/scrollbar/cocoa_scroll_bar.mm

Index: ui/views/controls/scrollbar/cocoa_scroll_bar.mm
diff --git a/ui/views/controls/scrollbar/cocoa_scroll_bar.mm b/ui/views/controls/scrollbar/cocoa_scroll_bar.mm
index 40390cd1b95227b67b4369d2cb1166805f861ab6..9d54b673b7772dac0d8b2fdf12c75d8f286a4249 100644
--- a/ui/views/controls/scrollbar/cocoa_scroll_bar.mm
+++ b/ui/views/controls/scrollbar/cocoa_scroll_bar.mm
@@ -208,12 +208,12 @@ gfx::Rect CocoaScrollBar::GetTrackBounds() const {
 //////////////////////////////////////////////////////////////////
 // CocoaScrollBar, ScrollBar:
 
-int CocoaScrollBar::GetLayoutSize() const {
-  return scroller_style_ == NSScrollerStyleOverlay ? 0 : ScrollbarThickness();
+int CocoaScrollBar::GetThickness() const {
+  return ScrollbarThickness();
 }
 
-int CocoaScrollBar::GetContentOverlapSize() const {
-  return scroller_style_ == NSScrollerStyleLegacy ? 0 : ScrollbarThickness();
+bool CocoaScrollBar::OverlapsContent() const {
+  return scroller_style_ == NSScrollerStyleOverlay;
 }
 
 //////////////////////////////////////////////////////////////////