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The TickAnimationsIf is not a member function and is used in the same
file. In this case, it should be in the anonymous namespace.

This CL doesn't introduce any behavior change.

Bug: None
Change-Id: I4cc3340335dfbd8b9c3b50765710d8c46bbda603
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1604110Reviewed-by: Yi Gu <yigu@chromium.org>
Reviewed-by: Majid Valipour <majidvp@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659119}