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This removes the dependency on the large logging.h header for code
that just wants to use these macros.

Bug: 1031540
Change-Id: Iead12cd42ab634abc0ca442a0716999536d83ad6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2161035Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762055}