Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/[css|rendering|clipboard]

Source/core/rendering/RenderVTTCue.h

Index: Source/core/rendering/RenderVTTCue.h
diff --git a/Source/core/rendering/RenderVTTCue.h b/Source/core/rendering/RenderVTTCue.h
index f94b3e2e2cf4b9cc509547e437fdfdfea342e8a3..e0159ba391df08b5db360d975c5426237f3cb1f1 100644
--- a/Source/core/rendering/RenderVTTCue.h
+++ b/Source/core/rendering/RenderVTTCue.h
@@ -35,12 +35,12 @@ namespace blink {
 class VTTCue;
 class VTTCueBox;
 
-class RenderVTTCue FINAL : public RenderBlockFlow {
+class RenderVTTCue final : public RenderBlockFlow {
 public:
     explicit RenderVTTCue(VTTCueBox*);
 
 private:
-    virtual void layout() OVERRIDE;
+    virtual void layout() override;
 
     bool isOutside() const;
     bool isOverlapping() const;