Revert of -enable GPU Rasterization for content with any author defined viewport. (patchset #1 id:1 of https://codereview.chromium.org/2154193002/ )

Reason for revert:
Relanding this has potentially caused a layout test to fail (https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20%28dbg%29/builds/8452). The build sheriff has asked me to revert it.

Adding aelias & vmiura so they can do a more refined revert on their return from vacation.

Original issue's description:
> Reland of -enable GPU Rasterization for content with any author defined viewport. (patchset #1 id:1 of https://codereview.chromium.org/2156553002/ )
>
> Reason for revert:
> Reverting change now that we have collected data from telemetry.
>
> Original issue's description:
> > Revert of Re-enable GPU Rasterization for content with any author defined viewport. (patchset #2 id:20001 of https://codereview.chromium.org/2097413003/ )
> >
> > Reason for revert:
> > This has caused an unexpectedly large regression in overall PSS (about 5MB, graph here: https://chromeperf.appspot.com/report?sid=0b072725c25637efb0d3a44383da1e24e42bbb3740a00505e4040af2173423b0&start_rev=402061&end_rev=402790).
> > The owners are both OOO and this is blocking Android release. This has already been reverted in the release branch but our infrastructure cannot gather data from the branch to confirm that the revert has had the intended result.
> >
> > This revert will allow us to confirm that this CL was the cause of the regression. Once confirmed (or otherwise) via telemetry dashboards this revert will be re-reverted.
> >
> > Original issue's description:
> > > Re-enable GPU Rasterization for content with any author defined viewport.
> > >
> > > BUG=591179
> > >
> > > Committed: https://crrev.com/a017b667a53b3ee5f8bc630be98c37ebf53a2339
> > > Cr-Commit-Position: refs/heads/master@{#402702}
> >
> > TBR=aelias@chromium.org,chrishtr@chromium.org,vmiura@chromium.org
> > # Not skipping CQ checks because original CL landed more than 1 days ago.
> > BUG=591179
> >
> > Committed: https://crrev.com/10a77702aa0490dfaaa6e354151b24b738474fb4
> > Cr-Commit-Position: refs/heads/master@{#405750}
>
> TBR=aelias@chromium.org,chrishtr@chromium.org,vmiura@chromium.org,primiano@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=591179
>
> Committed: https://crrev.com/5f19720ded2369857bee408ab48e11e7b5d28f7b
> Cr-Commit-Position: refs/heads/master@{#405974}

TBR=aelias@chromium.org,chrishtr@chromium.org,vmiura@chromium.org,primiano@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=591179

Review-Url: https://codereview.chromium.org/2155193002
Cr-Commit-Position: refs/heads/master@{#405983}
4 files changed