Consistently use only one of virtual/OVERRIDE/FINAL.

src/serialize.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 740 matching lines @@
 
 
 // Used to insert a deserialized internalized string into the string table.
 class StringTableInsertionKey : public HashTableKey {
  public:
   explicit StringTableInsertionKey(String* string)
       : string_(string), hash_(HashForObject(string)) {
     DCHECK(string->IsInternalizedString());
   }
 
-  virtual bool IsMatch(Object* string) OVERRIDE {
+  bool IsMatch(Object* string) OVERRIDE {
     // We know that all entries in a hash table had their hash keys created.
     // Use that knowledge to have fast failure.
     if (hash_ != HashForObject(string)) return false;
     // We want to compare the content of two internalized strings here.
     return string_->SlowEquals(String::cast(string));
   }
 
-  virtual uint32_t Hash() OVERRIDE { return hash_; }
+  uint32_t Hash() OVERRIDE { return hash_; }
 
-  virtual uint32_t HashForObject(Object* key) OVERRIDE {
+  uint32_t HashForObject(Object* key) OVERRIDE {
     return String::cast(key)->Hash();
   }
 
   MUST_USE_RESULT virtual Handle<Object> AsHandle(Isolate* isolate)
       OVERRIDE {
     return handle(string_, isolate);
   }
 
   String* string_;
   uint32_t hash_;
@@ skipping 1699 matching lines @@
   return GetHeaderValue(kNumInternalizedStringsOffset);
 }
 
 Vector<const uint32_t> SerializedCodeData::CodeStubKeys() const {
   int reservations_size = GetHeaderValue(kReservationsOffset) * kInt32Size;
   const byte* start = data_ + kHeaderSize + reservations_size;
   return Vector<const uint32_t>(reinterpret_cast<const uint32_t*>(start),
                                 GetHeaderValue(kNumCodeStubKeysOffset));
 }
 } }  // namespace v8::internal