Don't use NSBundle when unsure of thread safety.

BUG=24842
TEST=unit tests pass, app still works
Review URL: http://codereview.chromium.org/271094

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29077 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed