Cleanup: remove redundant tab close observation from TabModalConfirmDialogDelegate

chrome/browser/ui/tab_modal_confirm_dialog_browsertest.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_TAB_MODAL_CONFIRM_DIALOG_BROWSERTEST_H_
 #define CHROME_BROWSER_UI_TAB_MODAL_CONFIRM_DIALOG_BROWSERTEST_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
 #include "chrome/test/base/in_process_browser_test.h"
 
 class MockTabModalConfirmDialogDelegate : public TabModalConfirmDialogDelegate {
  public:
   class Delegate {
    public:
     virtual void OnAccepted() = 0;
     virtual void OnCanceled() = 0;
    protected:
     virtual ~Delegate() {}
   };
 
-  MockTabModalConfirmDialogDelegate(content::WebContents* web_contents,
-                                    Delegate* delegate);
+  MockTabModalConfirmDialogDelegate(Delegate* delegate);
   virtual ~MockTabModalConfirmDialogDelegate();
 
   virtual string16 GetTitle() OVERRIDE;
   virtual string16 GetMessage() OVERRIDE;
 
   virtual void OnAccepted() OVERRIDE;
   virtual void OnCanceled() OVERRIDE;
 
  private:
   Delegate* delegate_;
@@ skipping 22 matching lines @@
   TabModalConfirmDialog* dialog_;
 
   int accepted_count_;
   int canceled_count_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TabModalConfirmDialogTest);
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_MODAL_CONFIRM_DIALOG_BROWSERTEST_H_