Revert "Soften the history.{push,replace}State throttling mechanism."

This reverts commit 1f637a1a25fc806655189b8acfe992736d02db6c.

Reason for revert: Part 2 of trying to revert history throttling changes to see if https://bugs.chromium.org/p/chromium/issues/detail?id=870861 improves.

Original change's description:
> Soften the history.{push,replace}State throttling mechanism.
> 
> johnme@ suggests a better way to handle it; let's do that.
> 
> Bug: 786211
> Change-Id: I446c70117451d2ef49ce13f5884ebb858d9ee392
> Reviewed-on: https://chromium-review.googlesource.com/1161400
> Commit-Queue: Chris Palmer <palmer@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#580455}

TBR=palmer@chromium.org,dcheng@chromium.org,kinuko@chromium.org

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

Bug: 786211
Change-Id: Ia6a35add136361834c3afb40295b950c05cb9169
Reviewed-on: https://chromium-review.googlesource.com/1171709
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582434}
2 files changed