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This reverts commit 047c361c.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Defer location change events and processing during page load
> 
> Improves speed of page load stress test from 146 seconds to 43 seconds.
> 
> Also add logging for accessibility page load speed.
> 
> Bug: 976849
> Change-Id: I51d2833366b7b54b2abb9fde40811d29ef287aef
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1675917
> Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
> Commit-Queue: Nektarios Paisios <nektar@chromium.org>
> Reviewed-by: Nektarios Paisios <nektar@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#672315}

TBR=nektar@chromium.org,aleventhal@chromium.org

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

Bug: 976849
Change-Id: I0ef892affa0f6c9a2888307262f12bc720c55148
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1761715Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689150}