Consistently use only one of virtual/OVERRIDE/FINAL.

src/ast-value-factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 38 matching lines @@
   int pos_;
 };
 
 }
 
 class AstRawStringInternalizationKey : public HashTableKey {
  public:
   explicit AstRawStringInternalizationKey(const AstRawString* string)
       : string_(string) {}
 
-  virtual bool IsMatch(Object* other) OVERRIDE {
+  bool IsMatch(Object* other) OVERRIDE {
     if (string_->is_one_byte_)
       return String::cast(other)->IsOneByteEqualTo(string_->literal_bytes_);
     return String::cast(other)->IsTwoByteEqualTo(
         Vector<const uint16_t>::cast(string_->literal_bytes_));
   }
 
-  virtual uint32_t Hash() OVERRIDE {
-    return string_->hash() >> Name::kHashShift;
-  }
+  uint32_t Hash() OVERRIDE { return string_->hash() >> Name::kHashShift; }
 
-  virtual uint32_t HashForObject(Object* key) OVERRIDE {
+  uint32_t HashForObject(Object* key) OVERRIDE {
     return String::cast(key)->Hash();
   }
 
-  virtual Handle<Object> AsHandle(Isolate* isolate) OVERRIDE {
+  Handle<Object> AsHandle(Isolate* isolate) OVERRIDE {
     if (string_->is_one_byte_)
       return isolate->factory()->NewOneByteInternalizedString(
           string_->literal_bytes_, string_->hash());
     return isolate->factory()->NewTwoByteInternalizedString(
         Vector<const uint16_t>::cast(string_->literal_bytes_), string_->hash());
   }
 
  private:
   const AstRawString* string_;
 };
@@ skipping 293 matching lines @@
     if (isolate_) {
       new_string->Internalize(isolate_);
     }
     entry->value = reinterpret_cast<void*>(1);
   }
   return reinterpret_cast<AstRawString*>(entry->key);
 }
 
 
 } }  // namespace v8::internal