Merge the ProgramBinary class into Program.

BUG=angle:731

Change-Id: I2ee97155841dc62f04bb71c1f2035d210fd3883c
Reviewed-on: https://chromium-review.googlesource.com/232694
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
MANGLE egl::Display.

BUG=angle:794

Change-Id: Id131f3119100030d6ee630e357a8d28396a6a813
Reviewed-on: https://chromium-review.googlesource.com/231852
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>