This introduces a helper type to act as the initialization data type
for input element arrays. A WrappedArray class acts as a helper class
to wrap a C array and size into a C++ class, similar to std::array
but without the data storage.

Also move resource deallocation memory counting into a single code
path.

BUG=angleproject:2034

Change-Id: I5e108254777f0df65f5f60fe26e760c71b95b542
Reviewed-on: https://chromium-review.googlesource.com/506775Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>