Fix overflow:overlay scrollbar width for paint.

third_party/WebKit/Source/core/layout/LayoutBox.h

Index: third_party/WebKit/Source/core/layout/LayoutBox.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.h b/third_party/WebKit/Source/core/layout/LayoutBox.h
index 37084cfc23c7b8a74e129bf7bb90e43fc99397c3..aca950dfdaef5226338fab9bb65e51c04b10e851 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.h
@@ -1088,7 +1088,7 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
   // Returns the intersection of all overflow clips which apply.
   virtual LayoutRect overflowClipRect(
       const LayoutPoint& location,
-      OverlayScrollbarClipBehavior = IgnoreOverlayScrollbarSize) const;
+      OverlayScrollbarClipBehavior = IgnorePlatformOverlayScrollbarSize) const;
   LayoutRect clipRect(const LayoutPoint& location) const;
 
   // Returns the combination of overflow clip, contain: paint clip and CSS clip
@@ -1445,7 +1445,7 @@ class CORE_EXPORT LayoutBox : public LayoutBoxModelObject {
 
   void excludeScrollbars(
       LayoutRect&,
-      OverlayScrollbarClipBehavior = IgnoreOverlayScrollbarSize) const;
+      OverlayScrollbarClipBehavior = IgnorePlatformOverlayScrollbarSize) const;
 
   LayoutUnit containingBlockLogicalWidthForPositioned(
       const LayoutBoxModelObject* containingBlock,