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Replace TBR= with Tbr:, BUG= with Bug:, TEST= with Test:, NOTRY= with
No-Try: and CC= with CC:.

Most of the footers are available here:
https://www.chromium.org/developers/contributing-code/-bug-syntax.

Bug: None
Change-Id: I79ad7cd84ceac8a1f5a08b9e87f1581c0efb31ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089477Reviewed-by: Andrii Shyshkalov <tandrii@google.com>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#747851}