Consistently use only one of virtual/OVERRIDE/FINAL.

src/d8.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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1521 matching lines @@
     void* data = AllocateUninitialized(length);
     return data == NULL ? data : memset(data, 0, length);
   }
   virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
   virtual void Free(void* data, size_t) { free(data); }
 };
 
 
 class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
  public:
-  virtual void* Allocate(size_t) OVERRIDE {
-    return malloc(0);
-  }
-  virtual void* AllocateUninitialized(size_t length) OVERRIDE {
-    return malloc(0);
-  }
-  virtual void Free(void* p, size_t) OVERRIDE {
-    free(p);
-  }
+  void* Allocate(size_t) OVERRIDE { return malloc(0); }
+  void* AllocateUninitialized(size_t length) OVERRIDE { return malloc(0); }
+  void Free(void* p, size_t) OVERRIDE { free(p); }
 };
 
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 class StartupDataHandler {
  public:
   StartupDataHandler(const char* exec_path, const char* natives_blob,
                      const char* snapshot_blob) {
     // If we have (at least one) explicitly given blob, use those.
     // If not, use the default blob locations next to the d8 binary.
@@ skipping 191 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif