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This reverts commit 45013dfc.

Reason for revert: Performance regressions on touch_handler_scrolling.html

This patch turned up a few performance regressions, primarily:
tough_scheduling_cases/touch_handler_scrolling.html
(see: https://crbug.com/888269).

Other performance regressions:
https://chromeperf.appspot.com/group_report?rev=593255

Original change's description:
> Promote PaintTouchActionRects to stable
>
> This change enables PaintTouchActionRects by default. This is a
> new implementation of how the blink->cc logic works for the css
> touch-action feature. The big idea behind PaintTouchActionRects is to
> compute touch-action rects during paint, in paint order, as part of the
> background paint phase.
>
> With this change we expect better performance (primarily a drop in
> ScrollingCoordinator time: Blink.ScrollingCoordinator.UpdateTime) as
> well as observable bug fixes (e.g., https://crbug.com/826746).
>
> Bug: 836905, 881894
> Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I47a26250bad4c9e208b4f9b11e8eea3cf4d182aa
> Reviewed-on: https://chromium-review.googlesource.com/1233114
> Reviewed-by: Philip Rogers <pdr@chromium.org>
> Commit-Queue: Xida Chen <xidachen@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#593255}

TBR=pdr@chromium.org,xidachen@chromium.org

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

Bug: 836905, 881894
Change-Id: I775e60074f4d5bca5a907a1da104f5441212769a
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1240184
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Reviewed-by: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593540}