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CL produced with ESLint --fix and clang-format.

This is in preparation for turning on no-var and prefer-const ESLint checks
for that folder.

Bug: 720034
Change-Id: I6467d1308118f67f076708612247852568fba2bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1885652
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Auto-Submit: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710439}