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The dismiss status is recorded in profile prefs.

Bug: 1157892
Change-Id: I3fe60ffa5bd1ed99a9973e18fc6df1812b7517d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2597902
Commit-Queue: Yue Zhang <yuezhanggg@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839203}