Use override consistently instead of virtual.

net/quic/test_tools/crypto_test_utils_openssl.cc

 // Copyright 2013 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.
 
 #include "net/quic/test_tools/crypto_test_utils.h"
 
 #include <openssl/bn.h>
 #include <openssl/ec.h>
 #include <openssl/ecdsa.h>
 #include <openssl/evp.h>
@@ skipping 15 matching lines @@
 
 } // namespace anonymous
 
 namespace net {
 
 namespace test {
 
 class TestChannelIDKey : public ChannelIDKey {
  public:
   explicit TestChannelIDKey(EVP_PKEY* ecdsa_key) : ecdsa_key_(ecdsa_key) {}
-  virtual ~TestChannelIDKey() { }
+  virtual ~TestChannelIDKey() OVERRIDE {}
 
   // ChannelIDKey implementation.
 
   virtual bool Sign(StringPiece signed_data,
                     string* out_signature) const OVERRIDE {
     EVP_MD_CTX md_ctx;
     EVP_MD_CTX_init(&md_ctx);
     crypto::ScopedOpenSSL<EVP_MD_CTX, EvpMdCtxCleanUp>
         md_ctx_cleanup(&md_ctx);
 
@@ skipping 120 matching lines @@
 };
 
 // static
 ChannelIDSource* CryptoTestUtils::ChannelIDSourceForTesting() {
   return new TestChannelIDSource();
 }
 
 }  // namespace test
 
 }  // namespace net