MainFrame scrollbars should work with RFV instead of FV

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
index 179a79dff9e1fee9ca19be77ca42ea322d50f70e..d72f5621172d7358672c64de564787de11f98332 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h
@@ -293,6 +293,7 @@ class CORE_EXPORT PaintLayerScrollableArea final
   int pageStep(ScrollbarOrientation) const override;
   ScrollBehavior scrollBehaviorStyle() const override;
   CompositorAnimationTimeline* compositorAnimationTimeline() const override;
+  void getTickmarks(Vector<IntRect>& rects) const override;
 
   void visibleSizeChanged();
 
@@ -334,6 +335,10 @@ class CORE_EXPORT PaintLayerScrollableArea final
     return hasScrollbar() || scrollCorner() || resizer();
   }
 
+  // TODO(crbug.com/661236): Implement this method by refactoring relevant bits
+  // from updateAfterLayout.
+  void updateScrollbars() override{};

[skobes, 2016/11/09 23:18:25]

This method should just go away right?  Once RFV owns its own scrollbars it can
update them directly.

[ymalik, 2016/11/10 17:58:04]

Yeah. I added a comment in the parent class and and removed this one.

+
   LayoutScrollbarPart* scrollCorner() const override { return m_scrollCorner; }
 
   void resize(const PlatformEvent&, const LayoutSize&);