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

chrome/browser/infobars/confirm_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_CONFIRM_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_INFOBARS_CONFIRM_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/infobar_delegate.h"
 
 // An interface derived from InfoBarDelegate implemented by objects wishing to
 // control a ConfirmInfoBar.
 class ConfirmInfoBarDelegate : public InfoBarDelegate {
  public:
   enum InfoBarButton {
     BUTTON_NONE   = 0,
     BUTTON_OK     = 1 << 0,
     BUTTON_CANCEL = 1 << 1,
@@ skipping 47 matching lines @@
  private:
   // InfoBarDelegate:
   virtual InfoBar* CreateInfoBar(InfoBarService* owner) OVERRIDE;
   virtual bool EqualsDelegate(InfoBarDelegate* delegate) const OVERRIDE;
   virtual ConfirmInfoBarDelegate* AsConfirmInfoBarDelegate() OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(ConfirmInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_INFOBARS_CONFIRM_INFOBAR_DELEGATE_H_