The program pipeline object management entries are:
GenProgramPipelines
DeleteProgramPipelines
BindProgramPipeline
IsProgramPipeline

BUG:angleproject:2123

Change-Id: I114d054b90caf2ee3f9befef7439552a1c309bc4
Reviewed-on: https://chromium-review.googlesource.com/629978
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>