Revert "Fix binary serialization to use explicit size and type." This reverts commit 261988513e89479a0d121d045a8d89b64dc68214. Change-Id: I959ca14fcbb257f12005f7f0b64a600e906a118c Reviewed-on: https://chromium-review.googlesource.com/199630 Tested-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org>