Protect against overflow in BinaryInputStream. BUG=angleproject:1112 Change-Id: I6d58d9e0db97ec6c67661abd92b57f61f357d6b5 Reviewed-on: https://chromium-review.googlesource.com/316640 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>