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This change does not implement anything other than plumbing load
and response bits from the network stack across from the blink
loader.

BUG=348877

Change-Id: Id2b455352b8b26c93cf5e87bee054db90e774480
Reviewed-on: https://chromium-review.googlesource.com/1101237
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567722}