Replace OVERRIDE and FINAL with their C++11 counterparts in core/accessibility

Source/core/accessibility/AXARIAGrid.h

Index: Source/core/accessibility/AXARIAGrid.h
diff --git a/Source/core/accessibility/AXARIAGrid.h b/Source/core/accessibility/AXARIAGrid.h
index 3d7cd18cdac8c229365ed3587b63ec1123e44623..94f66f877309b53a116e8e5c8782858acd329a50 100644
--- a/Source/core/accessibility/AXARIAGrid.h
+++ b/Source/core/accessibility/AXARIAGrid.h
@@ -37,7 +37,7 @@ namespace blink {
 class AXTableCell;
 class AXTableHeaderContainer;
 
-class AXARIAGrid FINAL : public AXTable {
+class AXARIAGrid final : public AXTable {
 
 private:
     explicit AXARIAGrid(RenderObject*);
@@ -45,15 +45,15 @@ public:
     static PassRefPtr<AXARIAGrid> create(RenderObject*);
     virtual ~AXARIAGrid();
 
-    virtual bool isAriaTable() const OVERRIDE { return true; }
+    virtual bool isAriaTable() const override { return true; }
 
-    virtual void addChildren() OVERRIDE;
+    virtual void addChildren() override;
 
 private:
     // ARIA treegrids and grids support selected rows.
-    virtual bool supportsSelectedRows() OVERRIDE { return true; }
-    virtual bool isMultiSelectable() const OVERRIDE { return true; }
-    virtual bool isTableExposableThroughAccessibility() const OVERRIDE { return true; }
+    virtual bool supportsSelectedRows() override { return true; }
+    virtual bool isMultiSelectable() const override { return true; }
+    virtual bool isTableExposableThroughAccessibility() const override { return true; }
 
     bool addTableCellChild(AXObject*, HashSet<AXObject*>& appendedRows, unsigned& columnCount);
 };