Add external host binding permission for Extension DOMUI.
Add external host binding permission for Extension DOMUI.

Committing for skare@google.com, original change at http://codereview.chromium.org/3074002/show .

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/3189022

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@57417 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser