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This reverts commit c0913ca9 and most
of commit b11af76b, including support
for release channel suffix on packages, archive_name_override, and C++
build flags for channel name.

context_provider_test_connector.* are kept in their new locations.

The TODO for https://crbug.com/1046615 is removed as that is obsolete.

Bug: 1029184,1046615,1049378
Change-Id: Ia0b7191d15a889bc497ce77a4250b9db168e58f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2262594Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Commit-Queue: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782035}