Replace OVERRIDE->override and FINAL->final since we now require C++11.

src/compiler/value-numbering-reducer.h

Index: src/compiler/value-numbering-reducer.h
diff --git a/src/compiler/value-numbering-reducer.h b/src/compiler/value-numbering-reducer.h
index 546226c28e0a09b5e8200ff2bcb11366c6b9e7c9..822b6075c5ff4b5c6801f1e212cc408c6188f639 100644
--- a/src/compiler/value-numbering-reducer.h
+++ b/src/compiler/value-numbering-reducer.h
@@ -11,12 +11,12 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-class ValueNumberingReducer FINAL : public Reducer {
+class ValueNumberingReducer final : public Reducer {
  public:
   explicit ValueNumberingReducer(Zone* zone);
   ~ValueNumberingReducer();
 
-  Reduction Reduce(Node* node) OVERRIDE;
+  Reduction Reduce(Node* node) override;
 
  private:
   enum { kInitialCapacity = 256u, kCapacityToSizeRatio = 2u };