Parent the AppInfoDialog using a ModalDialogHost

chrome/browser/ui/cocoa/apps/app_info_dialog_cocoa.mm

 // 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.
 
 #include "base/logging.h"
 #include "chrome/browser/ui/apps/app_info_dialog.h"
 
-void ShowAppInfoInAppList(gfx::NativeWindow parent,
-                          const gfx::Rect& app_list_bounds,
-                          Profile* profile,
-                          const extensions::Extension* app,
-                          const base::Closure& close_callback) {
+void ShowAppInfoModally(web_modal::ModalDialogHost* host,
+                        const gfx::Size& size,
+                        Profile* profile,
+                        const extensions::Extension* app,
+                        const base::Closure& close_callback) {
   // TODO(sashab): Implement the App Info dialog on Mac.
   NOTIMPLEMENTED();
 }
-
-void ShowAppInfoInNativeDialog(gfx::NativeWindow parent,
-                               const gfx::Size& size,
-                               Profile* profile,
-                               const extensions::Extension* app,
-                               const base::Closure& close_callback) {
-  // TODO(sashab): Implement the App Info dialog on Mac.
-  NOTIMPLEMENTED();
-}