Remove linked_ptr from random bits of Chromium.

BUG=556939

Change-Id: I2520b0313a1ec5d180a5ec15a2883b338c640c2e
Reviewed-on: https://chromium-review.googlesource.com/c/1379117
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Wei Li <weili@chromium.org>
Reviewed-by: Bill Orr <billorr@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617176}
12 files changed