Linux: Default to not using custom frame under Fluxbox.
Linux: Default to not using custom frame under Fluxbox.

BUG=19130
TESTED=checked that it compiles :-P

Review URL: http://codereview.chromium.org/173079

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@23760 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