Linux: Fix DCHECK failure in Chrome caused by re-entrant rendering. This wasn't actually causing problems in release builds (presumably O3D was able to complete the re-entrant render action without problems), but we still don't want to do it.
Linux: Fix DCHECK failure in Chrome caused by re-entrant rendering. This wasn't actually causing problems in release builds (presumably O3D was able to complete the re-entrant render action without problems), but we still don't want to do it.

TEST=loaded a debug build repeatedly in Chrome/Linux and verified no DCHECK failure, whereas previously it happened a fair amount
BUG=none

Review URL: http://codereview.chromium.org/2944006

git-svn-id: http://src.chromium.org/svn/trunk/src@51999 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: afe174d1125236602abb807d08e8bd35cc5a9bc0
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