Fix invalidation during painting of scrollbars

Source/core/layout/LayoutBox.h

Index: Source/core/layout/LayoutBox.h
diff --git a/Source/core/layout/LayoutBox.h b/Source/core/layout/LayoutBox.h
index 8274683794f22d30be248da9cad96965ad1866b4..715c79ae614e7edc037993c2095192b6d24182e3 100644
--- a/Source/core/layout/LayoutBox.h
+++ b/Source/core/layout/LayoutBox.h
@@ -157,6 +157,12 @@ public:
 
     void setLocation(const LayoutPoint& location) { m_frameRect.setLocation(location); }
 
+    // FIXME: Currently scrollbars are using int geometry and positioned based on
+    // pixelSnappedBorderBoxRect whose size may change when location changes because of
+    // pixel snapping. This function is used to change location of the RenderBox outside
+    // of RenderBox::layout(). Will remove when we use LayoutUnits for scrollbars.
+    void setLocationAndUpdateOverflowControlsIfNeeded(const LayoutPoint&);
+
     void setSize(const LayoutSize& size) { m_frameRect.setSize(size); }
     void move(LayoutUnit dx, LayoutUnit dy) { m_frameRect.move(dx, dy); }