Revert of Remove DialogDelegate::OnClosed() which is redundant with

chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.h

 // Copyright 2013 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_SYNC_PROFILE_SIGNIN_CONFIRMATION_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_SYNC_PROFILE_SIGNIN_CONFIRMATION_DIALOG_VIEWS_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/ui/sync/profile_signin_confirmation_helper.h"
@@ skipping 33 matching lines @@
       ui::ProfileSigninConfirmationDelegate* delegate);
   ~ProfileSigninConfirmationDialogViews() override;
 
   // views::DialogDelegateView:
   base::string16 GetWindowTitle() const override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
   int GetDefaultDialogButton() const override;
   views::View* CreateExtraView() override;
   bool Accept() override;
   bool Cancel() override;
+  void OnClosed() override;
   ui::ModalType GetModalType() const override;
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
-  // views::WidgetDelegate::
-  void WindowClosing() override;
-
   // views::StyledLabelListener:
   void StyledLabelLinkClicked(views::StyledLabel* label,
                               const gfx::Range& range,
                               int event_flags) override;
 
   // views::ButtonListener:
   void ButtonPressed(views::Button*, const ui::Event& event) override;
 
   // Shows the dialog and releases ownership of this object. It will
   // delete itself when the dialog is closed. If |prompt_for_new_profile|
@@ skipping 15 matching lines @@
   // Whether the user should be prompted to create a new profile.
   bool prompt_for_new_profile_;
 
   // The button to continue with signin, if an extra button is required.
   views::LabelButton* continue_signin_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSigninConfirmationDialogViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_SYNC_PROFILE_SIGNIN_CONFIRMATION_DIALOG_VIEWS_H_