Use URLUtils::PathToFileURL instead of NSURL's version.
Use URLUtils::PathToFileURL instead of NSURL's version.

NSURL::fileURLWithPath: uses "localhost" as the file URL hostname,
which is currently unsupported by WebKit and breaks our unit tests.

appcelerator/titanium_desktop,wyrover/titanium_desktop,appcelerator/titanium_desktop,jvkops/titanium_desktop,jvkops/titanium_desktop,jvkops/titanium_desktop,wyrover/titanium_desktop,appcelerator/titanium_desktop,wyrover/titanium_desktop,wyrover/titanium_desktop,wyrover/titanium_desktop,wyrover/titanium_desktop,jvkops/titanium_desktop,appcelerator/titanium_desktop,appcelerator/titanium_desktop,jvkops/titanium_desktop,jvkops/titanium_desktop