Fix DCHECK that thinks fd = 0 is invalid.
Fix DCHECK that thinks fd = 0 is invalid.

BUG=25762
TEST=none
Review URL: http://codereview.chromium.org/466023

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@33725 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