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These files were inadvertently missing ARC guards and were not being
compiled with ARC.

BUG=1070852,1070933

Change-Id: I1005d41c26233d858aaee3670d3ce8b69ab561a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2150300
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759257}