Avoid relayout thrashing in history search.
Avoid relayout thrashing in history search.

Noticed this code was taking ~200ms on MBP to do a relayout for each result.
Split up calls to avoid this.

BUG=None

Review URL: https://codereview.chromium.org/1241953002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#338989}

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