Parent the AppInfoDialog using a ModalDialogHost

components/web_modal/popup_manager.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 COMPONENTS_WEB_MODAL_POPUP_MANAGER_H_
 #define COMPONENTS_WEB_MODAL_POPUP_MANAGER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "components/web_modal/single_popup_manager.h"
@@ skipping 49 matching lines @@
   // WebContentsUserData-alike API for retrieving the associated window
   // PopupManager from a |web_contents|. Any window which doesn't have a popup
   // manager associated will return null -- popups should not be issued against
   // that window.
   static PopupManager* FromWebContents(content::WebContents* web_contents);
 
   // Should not be called except by WebContents-owning class; not by clients.
   void RegisterWith(content::WebContents* web_contents);
   void UnregisterWith(content::WebContents* web_contents);
 
+  WebContentsModalDialogHost* host() { return host_; }
+
   // DEPRECATED.
   virtual void CloseAllDialogsForTesting(content::WebContents* web_contents);
 
  private:
   WebContentsModalDialogHost* host_;
 
   base::WeakPtrFactory<PopupManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupManager);
 };
 
 }  // namespace web_modal
 
 #endif  // COMPONENTS_WEB_MODAL_POPUP_MANAGER_H_