Revert "Condition DRP and connection check from prefetcher"

This reverts commit 9c2bfbf7f8d77c46315176e22e9eaa3b2796fd5c.

Reason for revert: Causes crashes
Bug:922156

Original change's description:
> Condition DRP and connection check from prefetcher
> 
> A previous CL added logic to enable link-rel: prefetch
> when "PredictivePrefetchingAllowedOnAllConnectionTypes"
> experiment is enabled (see change 1350210).
> 
> This CL applies the same logic for prefetches initiated by
> external Android apps. This brings Android APIs in-par with
> Chrome's logic.
> 
> Change-Id: Ic15c5c50fb90b2885ba9ea9b1851975c871188e5
> Bug: 850609,914503
> Reviewed-on: https://chromium-review.googlesource.com/c/1399525
> Reviewed-by: Benoit L <lizeb@chromium.org>
> Reviewed-by: Alexandr Ilin <alexilin@chromium.org>
> Commit-Queue: Tarun Bansal <tbansal@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#621624}

TBR=tbansal@chromium.org,lizeb@chromium.org,alexilin@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 850609, 914503, 922156
Change-Id: I59dc3191f468f2dd4c227865c13e6e1d7162264b
Reviewed-on: https://chromium-review.googlesource.com/c/1413660
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623009}
2 files changed