Make the App Info Dialog appear modal

chrome/browser/ui/apps/app_info_dialog.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_APPS_APP_INFO_DIALOG_H_
 #define CHROME_BROWSER_UI_APPS_APP_INFO_DIALOG_H_
 
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "ui/gfx/native_widget_types.h"
 
 class Profile;
 
 namespace extensions {
 class Extension;
 }
 
+namespace gfx {
+class Rect;
+}
+
 // Shows the chrome app information dialog box.
 // |close_callback| may be null.
 void ShowAppInfoDialog(gfx::NativeWindow parent_window,
+                       const gfx::Rect& dialog_widget_bounds,
                        Profile* profile,
                        const extensions::Extension* app,
                        const base::Closure& close_callback);
 
 #endif  // CHROME_BROWSER_UI_APPS_APP_INFO_DIALOG_H_