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

chrome/browser/infobars/simple_alert_infobar_delegate.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_INFOBARS_SIMPLE_ALERT_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_INFOBARS_SIMPLE_ALERT_INFOBAR_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/infobars/confirm_infobar_delegate.h"
 
 class SimpleAlertInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
   // Creates a simple alert delegate and adds it to |infobar_service|.
   static void Create(InfoBarService* infobar_service,
                      int icon_id,  // May be |kNoIconID| if no icon is shown.
                      const string16& message,
                      bool auto_expire);
 
@@ skipping 12 matching lines @@
       const content::LoadCommittedDetails& details) const OVERRIDE;
 
   const int icon_id_;
   string16 message_;
   bool auto_expire_;  // Should it expire automatically on navigation?
 
   DISALLOW_COPY_AND_ASSIGN(SimpleAlertInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_INFOBARS_SIMPLE_ALERT_INFOBAR_DELEGATE_H_