Fix Prevent issue

Fix Prevent issue

[Issue#]   CID: 33265
[Problem]  Resource leak.
[Cause]    Allocated memory is not released.
[Solution] Fix the code so that allocated memory is assigned to pointer
           from outer scope which is passed to the EVAS_CALLBACK_DEL callback
           (in which the memory is released).

[Verification]
    1. Build repository
    2. Run a test that will display pop-up from security origin.

Change-Id: Ic03284cb9b696e4d5aa8329d081700d2bd086381