FBTF: Remove "obviously" unneeded standard C++ library #includes.

chrome/browser/views/modal_dialog_delegate.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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_VIEWS_MODAL_DIALOG_DELEGATE_H_
 #define CHROME_BROWSER_VIEWS_MODAL_DIALOG_DELEGATE_H_
 #pragma once
 
-#include <string>
-
 #include "views/window/dialog_delegate.h"
 
 namespace views {
 class Window;
 }
 
 class ModalDialogDelegate : public views::DialogDelegate {
  public:
   virtual ~ModalDialogDelegate() {}
   // Methods called from AppModalDialog.
   virtual gfx::NativeWindow GetDialogRootWindow() = 0;
   virtual void ShowModalDialog();
   virtual void ActivateModalDialog();
   virtual void CloseModalDialog();
  protected:
   ModalDialogDelegate();
 
   // The dialog if it is currently visible.
   views::Window* dialog_;
 };
 
 #endif  // CHROME_BROWSER_VIEWS_MODAL_DIALOG_DELEGATE_H_