Standardize usage of virtual/override/final in net/

net/quic/test_tools/mock_random.h

 // Copyright (c) 2012 The Chromium 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 NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_
 #define NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_
 
 #include "base/compiler_specific.h"
 #include "net/quic/crypto/quic_random.h"
 
 namespace net {
 
 class MockRandom : public QuicRandom {
  public:
   // Initializes base_ to 0xDEADBEEF.
   MockRandom();
   explicit MockRandom(uint32 base);
 
   // QuicRandom:
   // Fills the |data| buffer with a repeating byte, initially 'r'.
-  virtual void RandBytes(void* data, size_t len) override;
+  void RandBytes(void* data, size_t len) override;
   // Returns base + the current increment.
-  virtual uint64 RandUint64() override;
+  uint64 RandUint64() override;
   // Does nothing.
-  virtual void Reseed(const void* additional_entropy,
-                      size_t entropy_len) override;
+  void Reseed(const void* additional_entropy, size_t entropy_len) override;
 
   // ChangeValue increments |increment_|. This causes the value returned by
   // |RandUint64| and the byte that |RandBytes| fills with, to change.
   void ChangeValue();
 
  private:
   uint32 base_;
   uint8 increment_;
 
   DISALLOW_COPY_AND_ASSIGN(MockRandom);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_MOCK_RANDOM_H_