Remove ForceHorriblySlowRectMapping

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 ae73f789eaf6bdcb3f8b59e707ca20cd4de99fbd..046892b3b146d33127059caa0efd73655b9b16ca 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -800,7 +800,6 @@ public:
     // If |ancestor| and |ancestorSkipped| are not null, on return *ancestorSkipped
     // is true if the layoutObject returned is an ancestor of |ancestor|.
     LayoutObject* container(const LayoutBoxModelObject* ancestor = nullptr, bool* ancestorSkipped = nullptr) const;
-    LayoutObject* containerCrossingFrameBoundaries() const;
     // Finds the container as if this object is fixed-position.
     LayoutBlock* containerForFixedPosition(const LayoutBoxModelObject* ancestor = nullptr, bool* ancestorSkipped = nullptr) const;
     // Finds the containing block as if this object is absolute-position.
@@ -1612,7 +1611,7 @@ private:
     // recomputeOverflow-capable. crbug.com/437012 and crbug.com/434700.
     inline void markContainingBlocksForOverflowRecalc();
 
-    inline void markContainerChainForPaintInvalidation();
+    inline void markAncestorsForPaintInvalidation();
 
     inline void invalidateSelectionIfNeeded(const LayoutBoxModelObject& paintInvalidationContainer, const PaintInvalidationState&, PaintInvalidationReason);
 
@@ -1651,6 +1650,8 @@ private:
     // The passed rect is mutated into the coordinate space of the paint invalidation container.
     const LayoutBoxModelObject* invalidatePaintRectangleInternal(const LayoutRect&) const;
 
+    LayoutObject* parentCrossingFrameBoundaries() const;
+
     static LayoutPoint uninitializedPaintOffset() { return LayoutPoint(LayoutUnit::max(), LayoutUnit::max()); }
 
     RefPtr<ComputedStyle> m_style;