Revert "Add a temporary hack to fix a race condition with FP layout tests"

This reverts commit 0d7cc8b3b2f5145860f3d05020450b0e16db9b40.

Reason for revert: Should be fixed by https://chromium-review.googlesource.com/c/chromium/src/+/735686

Original change's description:
> Add a temporary hack to fix a race condition with FP layout tests
> 
> A race condition means that navigation may not reach the browser process
> before a permission request does. This adds a hack to ensure that
> navigation has reached the browser by waiting for a cross-origin iframe
> to load.
> 
> BUG=689802,769189
> 
> Change-Id: I26dba360e322cf31c0ec200985a6908de9a82c35
> Reviewed-on: https://chromium-review.googlesource.com/688382
> Reviewed-by: Ian Clelland <iclelland@chromium.org>
> Commit-Queue: Raymes Khoury <raymes@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#506221}

TBR=raymes@chromium.org,qyearsley@chromium.org,iclelland@chromium.org

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

Bug: 689802, 769189
Change-Id: I36cd26c2d2683e020237e038f658fb30fe55354d
Reviewed-on: https://chromium-review.googlesource.com/821952
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Commit-Queue: Raymes Khoury <raymes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523358}
1 file changed