Fix virtual/override/final usage in Source/core/layout/.

Source/core/layout/LayoutFlowThread.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 30 matching lines @@
 
 typedef ListHashSet<LayoutMultiColumnSet*> LayoutMultiColumnSetList;
 
 // LayoutFlowThread is used to collect all the layout objects that participate in a flow thread. It
 // will also help in doing the layout. However, it will not layout directly to screen. Instead,
 // LayoutMultiColumnSet objects will redirect their paint and nodeAtPoint methods to this
 // object. Each LayoutMultiColumnSet will actually be a viewPort of the LayoutFlowThread.
 class CORE_EXPORT LayoutFlowThread: public LayoutBlockFlow {
 public:
     LayoutFlowThread();
-    virtual ~LayoutFlowThread() { }
+    ~LayoutFlowThread() override { }
 
-    virtual bool isLayoutFlowThread() const override final { return true; }
+    bool isLayoutFlowThread() const final { return true; }
     virtual bool isLayoutMultiColumnFlowThread() const { return false; }
     virtual bool isLayoutPagedFlowThread() const { return false; }
 
-    virtual bool supportsPaintInvalidationStateCachedOffsets() const override { return false; }
+    bool supportsPaintInvalidationStateCachedOffsets() const override { return false; }
 
-    virtual void layout() override;
+    void layout() override;
 
     // Always create a Layer for the LayoutFlowThread so that we
     // can easily avoid drawing the children directly.
-    virtual DeprecatedPaintLayerType layerTypeRequired() const override final { return NormalDeprecatedPaintLayer; }
+    DeprecatedPaintLayerType layerTypeRequired() const final { return NormalDeprecatedPaintLayer; }
 
     // Skip past a column spanner during flow thread layout. Spanners are not laid out inside the
     // flow thread, since the flow thread is not in a spanner's containing block chain (since the
     // containing block is the multicol container).
     virtual void skipColumnSpanner(LayoutBox*, LayoutUnit logicalTopInFlowThread) { }
 
     virtual void flowThreadDescendantWasInserted(LayoutObject*) { }
     virtual void flowThreadDescendantWillBeRemoved(LayoutObject*) { }
     virtual void flowThreadDescendantStyleWillChange(LayoutObject*, StyleDifference, const ComputedStyle& newStyle) { }
     virtual void flowThreadDescendantStyleDidChange(LayoutObject*, StyleDifference, const ComputedStyle& oldStyle) { }
 
-    virtual bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override final;
+    bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) final;
 
     virtual void addColumnSetToThread(LayoutMultiColumnSet*) = 0;
     virtual void removeColumnSetFromThread(LayoutMultiColumnSet*);
 
-    virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
+    void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const override;
 
     bool hasColumnSets() const { return m_multiColumnSetList.size(); }
 
     void validateColumnSets();
     void invalidateColumnSets();
     bool hasValidColumnSetInfo() const { return !m_columnSetsInvalidated && !m_multiColumnSetList.isEmpty(); }
 
-    virtual void mapRectToPaintInvalidationBacking(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const override;
+    void mapRectToPaintInvalidationBacking(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const override;
 
     LayoutUnit pageLogicalHeightForOffset(LayoutUnit);
     LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit, PageBoundaryRule = IncludePageBoundary);
 
     virtual void setPageBreak(LayoutUnit /*offset*/, LayoutUnit /*spaceShortage*/) { }
     virtual void updateMinimumPageHeight(LayoutUnit /*offset*/, LayoutUnit /*minHeight*/) { }
 
     virtual bool addForcedColumnBreak(LayoutUnit, LayoutObject* breakChild, bool isBefore, LayoutUnit* offsetBreakAdjustment = nullptr) { return false; }
 
     virtual bool isPageLogicalHeightKnown() const { return true; }
@@ skipping 58 matching lines @@
 };
 
 template <> struct ValueToString<LayoutMultiColumnSet*> {
     static String string(const LayoutMultiColumnSet* value) { return String::format("%p", value); }
 };
 #endif
 
 } // namespace blink
 
 #endif // LayoutFlowThread_h