Don't show focus rings when clicking on find in page bar buttons.
Don't show focus rings when clicking on find in page bar buttons.

Also, forward focus from match count label to text input.

BUG=520682

Review URL: https://codereview.chromium.org/1419093002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355671}

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