When we would allocate huge buffers, we would not always gracefully
fail and return a GL error back to the application. We should be able
to better handle buffer allocation failures with this patch.

BUG=angle:634

Change-Id: Ic3edce6d22b731ec52666a2a0e82f9a4fbbb23ae
Reviewed-on: https://chromium-review.googlesource.com/197994Reviewed-by: Nicolas Capens <nicolascapens@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>