This avoids a compile error where GCC is not compatible with MSVS
and Clang, who can both handle calls to forward declared functions
in templates. It explicitly specializes LazyResource for the used
template types.

BUG=angleproject:2182

Change-Id: Iedb1f157d0662b0ea4472c9b4e85828217be577e
Reviewed-on: https://chromium-review.googlesource.com/757758Reviewed-by: Jeff Gilbert <jgilbert@mozilla.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>