Fix debug.log creation, which has been broken since r58501.
Fix debug.log creation, which has been broken since r58501.

TEST=loaded O3D in Safari on Mac and verified that debug.log is created and used
BUG=none

Review URL: http://codereview.chromium.org/5651002

git-svn-id: http://src.chromium.org/svn/trunk/src@68520 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: b495b818fc651d510faaa815ec624e87c9e6e880
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser