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Search and replace to spell "supported" correctly. Also fix lint errors
in modified files.

Change-Id: I4411bc2737f7ceb1b9cfa9c3316864d038a3afb0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1949022Reviewed-by: Tsuyoshi Horo <horo@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721271}