Disable about:network for official builds since it's buggy.
Disable about:network for official builds since it's buggy.

BUG=9426
Review URL: http://codereview.chromium.org/56009

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@12665 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