Move all fast-path paint invalidation mapping into PaintInvalidationState

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

Index: third_party/WebKit/Source/core/layout/LayoutFlowThread.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutFlowThread.h b/third_party/WebKit/Source/core/layout/LayoutFlowThread.h
index eec35e950170d5111575f61a36aadbfdd68cf9c4..3bde9e0005df38ecace26196a2141ae400366627 100644
--- a/third_party/WebKit/Source/core/layout/LayoutFlowThread.h
+++ b/third_party/WebKit/Source/core/layout/LayoutFlowThread.h
@@ -54,8 +54,6 @@ public:
     virtual bool isLayoutMultiColumnFlowThread() const { return false; }
     virtual bool isLayoutPagedFlowThread() const { return false; }
 
-    bool supportsPaintInvalidationStateCachedOffsets() const override { return false; }
-
     static LayoutFlowThread* locateFlowThreadContainingBlockOf(const LayoutObject&);
 
     void layout() override;
@@ -82,7 +80,7 @@ public:
     void invalidateColumnSets();
     bool hasValidColumnSetInfo() const { return !m_columnSetsInvalidated && !m_multiColumnSetList.isEmpty(); }
 
-    void mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect&, const PaintInvalidationState*) const override;
+    void mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect&) const override;
 
     LayoutUnit pageLogicalHeightForOffset(LayoutUnit);
     LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit, PageBoundaryRule);