This moves the validation and entry point files to use a
consistent syntax. This will facilitate auto-generation.

Bug: angleproject:2263
Change-Id: If5d06e97db66783d7b3d7fb1d6365f8218d956ae
Reviewed-on: https://chromium-review.googlesource.com/846022
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>