[poc] curve-filter

third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp

Index: third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp b/third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp
index 7a945b5a61e7bd480e5d6602bdf0775c153dd4df..05844149c1f93723ae155cdd51c660ce5a1793fc 100644
--- a/third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutScrollbarTheme.cpp
@@ -25,9 +25,12 @@
 
 #include "core/layout/LayoutScrollbarTheme.h"
 
+#include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutScrollbar.h"
+#include "core/page/Page.h"
 #include "core/paint/ScrollbarPainter.h"
 #include "platform/graphics/GraphicsContext.h"
+#include "platform/graphics/GraphicsScreen.h"
 #include "platform/graphics/paint/DrawingRecorder.h"
 #include "platform/scroll/ScrollbarThemeClient.h"
 #include "wtf/StdLibExtras.h"
@@ -145,8 +148,15 @@ void LayoutScrollbarTheme::paintThumb(GraphicsContext& context, const ScrollbarT
     ScrollbarPainter(toLayoutScrollbar(scrollbar)).paintPart(context, ThumbPart, rect);
 }
 
+Page* LayoutScrollbarTheme::page(const ScrollbarThemeClient& scrollbar)
+{
+    return toLayoutScrollbar(scrollbar).owningLayoutObject()->frame()->page();
+}
+
 void LayoutScrollbarTheme::paintTickmarks(GraphicsContext& context, const ScrollbarThemeClient& scrollbar, const IntRect& rect)
 {
+    WillPaintForDevice device(Page::screenId(page(scrollbar)));
+
     ScrollbarTheme::theme().paintTickmarks(context, scrollbar, rect);
 }