Close web contents modal dialogs on content load start

chrome/browser/ui/views/tab_modal_confirm_dialog_views.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_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
@@ skipping 40 matching lines @@
 
  private:
   virtual ~TabModalConfirmDialogViews();
 
   // TabModalConfirmDialog:
   virtual void AcceptTabModalDialog() OVERRIDE;
   virtual void CancelTabModalDialog() OVERRIDE;
 
   // TabModalConfirmDialogCloseDelegate:
   virtual void CloseDialog() OVERRIDE;
+  virtual void SetPreventCloseOnLoadStart(bool prevent) OVERRIDE;
 
   // views::LinkListener:
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
+  content::WebContents* web_contents_;
+
   scoped_ptr<TabModalConfirmDialogDelegate> delegate_;
 
   // The message box view whose commands we handle.
   views::MessageBoxView* message_box_view_;
 
   views::Widget* dialog_;
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(TabModalConfirmDialogViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_MODAL_CONFIRM_DIALOG_VIEWS_H_