Dismiss DevicePermissionsPrompt when the widgets are destroyed.

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

Index: chrome/browser/ui/views/extensions/device_permissions_dialog_view.h
diff --git a/chrome/browser/ui/views/extensions/device_permissions_dialog_view.h b/chrome/browser/ui/views/extensions/device_permissions_dialog_view.h
index e8bab2c0d1e9554e2e1a4f23a7805ed5adc86387..8fee89d82ad5f3d0acd61ae0997e25423687ef92 100644
--- a/chrome/browser/ui/views/extensions/device_permissions_dialog_view.h
+++ b/chrome/browser/ui/views/extensions/device_permissions_dialog_view.h
@@ -22,18 +22,12 @@ class DevicePermissionsDialogView : public views::DialogDelegateView {
       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: