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This adds the file as an EG2 target, and updates #includes.

Bug: 987646
Change-Id: Iece7bdc789b49e36443566f6fc00fb9be6902fa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1756213
Commit-Queue: Ali Juma <ajuma@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#687347}