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This allows us to run the Client-Side Reactive Preconnect in the below
configs:
1) Default - Local predictions only
2) Local predictions with optimization guide filling in
3) Optimization guide only
4) No predictions

Bug: 1050101
Change-Id: I9eb87170aa0079f3384f1797b03cd3d850b1228e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094246Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748290}