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

src/typing.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_TYPING_H_
 #define V8_TYPING_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 51 matching lines @@
   int stack_local_index(int index) { return index; }
 
   int variable_index(Variable* var) {
     // Stack locals have the range [0 .. l]
     // Parameters have the range [-1 .. p]
     // We map this to [-p-2 .. -1, 0 .. l]
     return var->IsStackLocal() ? stack_local_index(var->index()) :
            var->IsParameter() ? parameter_index(var->index()) : kNoVar;
   }
 
-  void VisitDeclarations(ZoneList<Declaration*>* declarations) OVERRIDE;
-  void VisitStatements(ZoneList<Statement*>* statements) OVERRIDE;
+  void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
+  void VisitStatements(ZoneList<Statement*>* statements) override;
 
-#define DECLARE_VISIT(type) virtual void Visit##type(type* node) OVERRIDE;
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node) override;
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   DISALLOW_COPY_AND_ASSIGN(AstTyper);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPING_H_