[OriginTrials] Migrate origin trials from content to blink.

As part of onion soup, this CL completes the move of origin
trials from content/ to third_party/blink/.

Bug: 738505

Change-Id: Ieb11641f0872a6c47c09a3ea3ec4315cfbc89e68
Reviewed-on: https://chromium-review.googlesource.com/1012782
Reviewed-by: Scott Graham <[email protected]>
Reviewed-by: Alex Vallee <[email protected]>
Reviewed-by: Lei Zhang <[email protected]>
Reviewed-by: Jason Chase <[email protected]>
Reviewed-by: Kinuko Yasuda <[email protected]>
Reviewed-by: Kentaro Hara <[email protected]>
Commit-Queue: Lucas Gadani <[email protected]>
Cr-Commit-Position: refs/heads/master@{#554217}
52 files changed