Revert "Merge the ProgramBinary class into Program." Issues appeared on the FYI waterfall, content_gl_tests hangs. This reverts commit 2195a6d6032883ed05468d5ecd019e7cb9a27bce. Change-Id: I9fe1a53cf40887ae5a98fd77b4872f41085fcea7 Reviewed-on: https://chromium-review.googlesource.com/232386 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>