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This reverts commit 53d410bb.

Reason for revert: There is a CL landed after this that changes a type somewhere, reverting is not that trivial

Original change's description:
> Revert "[PM] Add FrameNode viewport intersection"
>
> This reverts commit cf2a7489.
>
> Reason for revert:
> FrameNodeImplBrowserTest.ViewportIntersection_PartiallyVisible failing on CrOS
>  - example build: https://ci.chromium.org/p/chromium/builders/ci/linux-chromeos-rel/41947
>
> TBR=pmonette@chromium.org
>
> Original change's description:
> > [PM] Add FrameNode viewport intersection
> >
> > This CLs plumbs the viewport intersection to the FrameNode, which
> > will allow the tracking of the visibility of each frame.
> >
> > Bug: 1077217
> > Change-Id: Id2811b1c52e4fa3f3c449d1b32a1cb7084f82116
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2399621
> > Reviewed-by: François Doray <fdoray@chromium.org>
> > Reviewed-by: danakj <danakj@chromium.org>
> > Reviewed-by: Nasko Oskov <nasko@chromium.org>
> > Reviewed-by: David Bokan <bokan@chromium.org>
> > Commit-Queue: Patrick Monette <pmonette@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#816728}
>
> TBR=danakj@chromium.org,nasko@chromium.org,bokan@chromium.org,fdoray@chromium.org,pmonette@chromium.org
>
> Change-Id: I4e1cb014232b82016e14fbd85352a6442323300f
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: 1077217
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2470463
> Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
> Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#817024}

TBR=danakj@chromium.org,nasko@chromium.org,fdoray@chromium.org,pmonette@chromium.org,ftirelo@chromium.org

# Not skipping CQ checks because this is a reland.

Bug: 1077217
Change-Id: I3c36272ac57b0857400331196a506069c596d36e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2471259Reviewed-by: Fabio Tirelo <ftirelo@chromium.org>
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817030}