The vast majority of places puts a semicolon after these macros
(DISALLOW_ASSIGN, DISALLOW_COPY_AND_ASSIGN). Thus remove the semicolon
from the definition and fix the few places that omitted the semicolon
at the use.

R=mlippautz@chromium.org

Bug: v8:8562
Change-Id: Id730576f3061b86d8a5cee0e0b9b762f693f16ec
Reviewed-on: https://chromium-review.googlesource.com/c/1371824Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58166}