Warn on missing OVERRIDE/virtual everywhere, not just in header files.

net/quic/test_tools/crypto_test_utils.cc

 // 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.
 
 #include "net/quic/test_tools/crypto_test_utils.h"
 
 #include "base/strings/string_piece.h"
 #include "net/quic/crypto/crypto_handshake.h"
 #include "net/quic/crypto/crypto_server_config.h"
 #include "net/quic/crypto/quic_decrypter.h"
@@ skipping 27 matching lines @@
   MOCK_METHOD0(CreateOutgoingReliableStream, ReliableQuicStream*());
 };
 
 // CryptoFramerVisitor is a framer visitor that records handshake messages.
 class CryptoFramerVisitor : public CryptoFramerVisitorInterface {
  public:
   CryptoFramerVisitor()
       : error_(false) {
   }
 
-  void OnError(CryptoFramer* framer) {
+  virtual void OnError(CryptoFramer* framer) OVERRIDE {
     error_ = true;
   }
 
-  void OnHandshakeMessage(const CryptoHandshakeMessage& message) {
+  virtual void OnHandshakeMessage(
+      const CryptoHandshakeMessage& message) OVERRIDE {
     messages_.push_back(message);
   }
 
   bool error() const {
     return error_;
   }
 
   const vector<CryptoHandshakeMessage>& messages() const {
     return messages_;
   }
@@ skipping 186 matching lines @@
                                 client_decrypter_key.data(),
                                 client_decrypter_key.length());
   CompareCharArraysWithHexError("server write IV",
                                 server_encrypter_iv.data(),
                                 server_encrypter_iv.length(),
                                 client_decrypter_iv.data(),
                                 client_decrypter_iv.length());
 }
 }  // namespace test
 }  // namespace net