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The current migration to Polymer 3 mistakenly used `clang-format-on`
instead of `clang-format on` after turning `clang-format` off via
`clang-format off`. This resulted in clang-format effectively being
disabled for affected files, this change fixes it. Steps:

- sed 's/clang-format-on/clang-format on/g'
- git cl format --js --full

TBR=dpapad

Bug: 1026426
Change-Id: I4364d325e3e7df1add0f83d93e8b18453f6014e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107591Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751331}