Remove banned initializer list usage in Assistant.

Bug: 956581
Change-Id: I6328e3d6a7f75b232094e14507d0c5614277ccfe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584468
Reviewed-by: Tao Wu <wutao@chromium.org>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#654104}
1 file changed