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

src/compiler/js-builtin-reducer.h

Index: src/compiler/js-builtin-reducer.h
diff --git a/src/compiler/js-builtin-reducer.h b/src/compiler/js-builtin-reducer.h
index 42221e972715737467ff9f6ac72d6569d8684495..14bf67595b9ffcceae14865f01588ff664419450 100644
--- a/src/compiler/js-builtin-reducer.h
+++ b/src/compiler/js-builtin-reducer.h
@@ -18,12 +18,12 @@ class JSGraph;
 class MachineOperatorBuilder;
 
 
-class JSBuiltinReducer FINAL : public Reducer {
+class JSBuiltinReducer final : public Reducer {
  public:
   explicit JSBuiltinReducer(JSGraph* jsgraph);
-  ~JSBuiltinReducer() FINAL {}
+  ~JSBuiltinReducer() final {}
 
-  Reduction Reduce(Node* node) FINAL;
+  Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceMathMax(Node* node);