Set policy decision to "USE" for webfonts.
Set policy decision to "USE" for webfonts.

[Problem]
When a user opens Ringmark web site - http://rng.io/?all - in an efl-browser,
the browser hangs up after 101 passed, "CSS3 Fonts" test step.
While it works well in a mini_browser and an efl_webview_app.

[Cause]
Policy decision were "DOWNLOAD" for webfonts which come with
"application/octet-stream" MIME type.

[Solution]
Set policy decision to "USE" to use webfonts - a.k.a. CSS Fonts -
in efl-browser - a.k.a. MCD browser.

Issue: CBWEBCORE-307

Change-Id: If03c8714971f63763ea6c666f6c932e629482d21

crosswalk-project/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl,crosswalk-project/chromium-efl,crosswalk-project/chromium-efl,hgl888/chromium-efl,hgl888/chromium-efl