Use a direct include of strings headers in chrome/browser/chromeos/.

chrome/browser/chromeos/cros/cert_library.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 CHROME_BROWSER_CHROMEOS_CROS_CERT_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_CERT_LIBRARY_H_
 
 #include <string>
 
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chromeos/network/cert_loader.h"
 #include "net/cert/x509_certificate.h"
 
 namespace chromeos {
 
 class CertNameComparator;
 
 // This class is responsible for keeping track of certificates in a UI
 // friendly manner. It observes CertLoader to receive certificate list
 // updates and sorts them by type for the UI. All public APIs are expected
@@ skipping 75 matching lines @@
   net::CertificateList user_certs_;
   net::CertificateList server_certs_;
   net::CertificateList server_ca_certs_;
 
   DISALLOW_COPY_AND_ASSIGN(CertLibrary);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_CERT_LIBRARY_H_