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::DialogDelegateView.

[Peter Kasting, 2015/04/20 21:33:33]

Nit: While here:

Since this class only subclasses views::DialogDelegateView, there should be just
one override section, headed "// views::DialogDelegateView:", and the methods in
it should be listed in the order in which they were declared within their base
classes, in the order in which the base classes themselves were declared.  In
this case, that would be this order:

GetDialogButtonLabel
GetModalType
GetWindowTitle
DeleteDelegate
Accept
GetPreferredSize

[Reilly Grant (use Gerrit), 2015/04/20 23:14:49]

Done.

+  void DeleteDelegate() override;
+
   // Overriding views::DialogDelegate.
-  bool Cancel() override;
   bool Accept() override;
 
   // Overriding views::DialogModel.
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
 
   // Overriding views::WidgetDelegate.
   ui::ModalType GetModalType() const override;
   base::string16 GetWindowTitle() const override;
 
   // Overriding views::View
   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_