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

src/unique.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_HYDROGEN_UNIQUE_H_
 #define V8_HYDROGEN_UNIQUE_H_
 
 #include <ostream>  // NOLINT(readability/streams)
 
 #include "src/base/functional.h"
@@ skipping 129 matching lines @@
   friend class SideEffectsTracker;
 };
 
 template <typename T>
 inline std::ostream& operator<<(std::ostream& os, Unique<T> uniq) {
   return os << Brief(*uniq.handle());
 }
 
 
 template <typename T>
-class UniqueSet FINAL : public ZoneObject {
+class UniqueSet final : public ZoneObject {
  public:
   // Constructor. A new set will be empty.
   UniqueSet() : size_(0), capacity_(0), array_(NULL) { }
 
   // Capacity constructor. A new set will be empty.
   UniqueSet(int capacity, Zone* zone)
       : size_(0), capacity_(capacity),
         array_(zone->NewArray<Unique<T> >(capacity)) {
     DCHECK(capacity <= kMaxCapacity);
   }
@@ skipping 194 matching lines @@
       }
       capacity_ = new_capacity;
       array_ = new_array;
     }
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_UNIQUE_H_