Dismiss DevicePermissionsPrompt when the widgets are destroyed.

chrome/browser/ui/views/extensions/device_permissions_dialog_view.h

 // Copyright 2014 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_EXTENSIONS_DEVICE_PERMISSIONS_DIALOG_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_EXTENSIONS_DEVICE_PERMISSIONS_DIALOG_VIEW_H_
 
 #include "extensions/browser/api/device_permissions_prompt.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace views {
 class TableView;
 }
 
 class DevicePermissionsTableModel;
 
 // Displays a device permissions selector prompt as a modal dialog constrained
 // to the window/tab displaying the given web contents.
 class DevicePermissionsDialogView : public views::DialogDelegateView {
  public:
   DevicePermissionsDialogView(
       scoped_refptr<extensions::DevicePermissionsPrompt::Prompt> prompt);
   ~DevicePermissionsDialogView() override;
 
-  // Overriding views::DialogDelegate.
-  bool Cancel() override;
-  bool Accept() override;
-
-  // Overriding views::DialogModel.
+  // views::DialogDelegateView:
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
-
-  // Overriding views::WidgetDelegate.
   ui::ModalType GetModalType() const override;
   base::string16 GetWindowTitle() const override;
-
-  // Overriding views::View
+  void DeleteDelegate() override;
+  bool Accept() override;
   gfx::Size GetPreferredSize() const override;
 
  private:
   scoped_refptr<extensions::DevicePermissionsPrompt::Prompt> prompt_;
 
   // Displays the list of devices.
   views::TableView* table_view_;
   scoped_ptr<DevicePermissionsTableModel> table_model_;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_EXTENSIONS_DEVICE_PERMISSIONS_DIALOG_VIEW_H_