Enable Clang warnings in .cc files for Linux+[Aura/ChromeOS]

chromeos/cryptohome/cryptohome_library.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 "chromeos/cryptohome/cryptohome_library.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/chromeos/chromeos_version.h"
@@ skipping 272 matching lines @@
   }
 
   virtual bool InstallAttributesIsFirstInstall() OVERRIDE {
     return !locked_;
   }
 
   virtual std::string GetSystemSalt() OVERRIDE {
     return kStubSystemSalt;
   }
 
-  virtual std::string EncryptWithSystemSalt(const std::string& token) {
+  virtual std::string EncryptWithSystemSalt(const std::string& token) OVERRIDE {
     return token;
   }
 
   virtual std::string DecryptWithSystemSalt(
-      const std::string& encrypted_token_hex) {
+      const std::string& encrypted_token_hex) OVERRIDE {
     return encrypted_token_hex;
   }
 
  private:
   std::map<std::string, std::string> install_attrs_;
   bool locked_;
   DISALLOW_COPY_AND_ASSIGN(CryptohomeLibraryStubImpl);
 };
 
 CryptohomeLibrary::CryptohomeLibrary() {}
@@ skipping 37 matching lines @@
   CHECK(!g_test_cryptohome_library || !impl);
   g_test_cryptohome_library = impl;
 }
 
 // static
 CryptohomeLibrary* CryptohomeLibrary::GetTestImpl() {
   return new CryptohomeLibraryStubImpl();
 }
 
 } // namespace chromeos