Fix graphics layer backing and offset for composited selection handles.

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

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index 830f3d90684fa3bb67f2c112649e4fe8c16f383b..3b28df12550cf8720dad571dd0bd6206e632dd34 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1204,12 +1204,6 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
     return localToAncestorTransform(nullptr, mode);
   }
 
-  // Convert a local point into the coordinate system of backing coordinates.
-  // Also returns the backing layer if needed.
-  FloatPoint localToInvalidationBackingPoint(
-      const LayoutPoint&,
-      PaintLayer** backingLayer = nullptr);
-
   // Return the offset from the container() layoutObject (excluding transforms
   // and multicol).
   virtual LayoutSize offsetFromContainer(const LayoutObject*) const;