Parent the AppInfoDialog using a ModalDialogHost

components/constrained_window/constrained_window_views.h

Index: components/constrained_window/constrained_window_views.h
diff --git a/components/constrained_window/constrained_window_views.h b/components/constrained_window/constrained_window_views.h
index ed4a82863d74c3961d79227db3821ad7cff6f4fe..80c3fb05280653a925199ba658a7da0054ced1bd 100644
--- a/components/constrained_window/constrained_window_views.h
+++ b/components/constrained_window/constrained_window_views.h
@@ -55,9 +55,19 @@ views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
 // |dialog->GetModalType()|.  The modal type must be either
 // ui::MODAL_TYPE_SYSTEM or ui::MODAL_TYPE_WINDOW.  This places the
 // dialog appropriately if |parent| is a valid browser window.
+// DEPRECATED: Use CreateModalDialogViews().
 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeView parent);
 
+// Create a widget for |dialog| that is modal to |host|. This could be a
+// WebContents, a browser window, or another kind of ModalDialogHost. The
+// modality is given by dialog->GetModalType(), which must be
+// ui::MODAL_TYPE_SYSTEM or ui::MODAL_TYPE_WINDOW. Calls through this API will
+// not use the PopupManager, but will have their position and lifetime
+// determined by |host|.
+views::Widget* CreateModalDialogViews(views::DialogDelegate* dialog,
+                                      web_modal::ModalDialogHost* host);
+
 }  // namespace constrained window
 
 #endif  // COMPONENTS_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_VIEWS_H_