| Index: third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp | 
| diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp | 
| index ed95ef9da96d7e9a04faeb27a7477c5350655248..b60cfbcbfbea6ef5c5a60358ba6299897314ea72 100644 | 
| --- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp | 
| +++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp | 
| @@ -162,8 +162,13 @@ void ScrollbarThemeOverlay::paintThumb(GraphicsContext& context, | 
| if (scrollbar.orientation() == VerticalScrollbar) | 
| part = WebThemeEngine::PartScrollbarVerticalThumb; | 
|  | 
| +  blink::WebThemeEngine::ExtraParams params; | 
| +  params.scrollbarThumb.scrollbarTheme = | 
| +      static_cast<WebScrollbarOverlayColorTheme>( | 
| +          scrollbar.getScrollbarOverlayColorTheme()); | 
| + | 
| Platform::current()->themeEngine()->paint(canvas, part, state, WebRect(rect), | 
| -                                            0); | 
| +                                            ¶ms); | 
| } | 
|  | 
| ScrollbarPart ScrollbarThemeOverlay::hitTest( | 
|  |