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This CL
 - adds the source file to sources list,
 - makes test source file be backward compatible with EG1,
 - adds required gn dependencies,
 - links to both eg1 and eg2 frameworks.

Bug: 866147
Change-Id: I5c6dc64c783db7a8863c53e69174257e35b719bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1897830
Commit-Queue: Nazerke Kalidolda <nazerke@google.com>
Auto-Submit: Nazerke Kalidolda <nazerke@google.com>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712538}