Revert "Promote PaintTouchActionRects to stable"

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}

third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2

@@ -1420,20 +1420,3 @@ Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit
 Bug(none) fast/events/touch/compositor-touch-hit-rects-svg-root.html [ Failure ]
 Bug(none) fast/events/touch/compositor-touch-hit-rects-table.html [ Failure ]
 Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-table.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-animation.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-global.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-many.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-non-composited-scroll-overflow-with-handler.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-non-composited-scroll.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-scroll.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-squashing.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-transform-changed-nolayout.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-trigger-commit.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-with-negative-child.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/gesture/gesture-scroll-by-page.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/gesture/touch-gesture-scroll-div-scaled.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/page-scaled-touch-gesture-click.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/touch-handler-assert-input-range.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/touch-rect-assert-first-layer-special.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/touch-rect-crash-on-unpromote-layer.html [ Failure ]
-Bug(none) virtual/paint-touchaction-rects/fast/events/touch/touch-scaled-scrolled.html [ Failure ]

third_party/WebKit/LayoutTests/TestExpectations

@@ -1869,8 +1869,6 @@ crbug.com/877361 virtual/threaded/fast/events/pinch/gesture-pinch-zoom-scroll-bu
 crbug.com/522648 fast/events/touch/compositor-touch-hit-rects-iframes.html [ Crash Failure Pass ]
 crbug.com/522648 virtual/mouseevent_fractional/fast/events/touch/compositor-touch-hit-rects-iframes.html [ Crash Failure Pass ]
 crbug.com/522648 virtual/paint-touchaction-rects/fast/events/touch/compositor-touch-hit-rects-iframes.html [ Skip ]
-crbug.com/522648 virtual/scroll_customization/fast/events/touch/compositor-touch-hit-rects-iframes.html [ Skip ]
-crbug.com/522648 virtual/user-activation-v2/fast/events/touch/compositor-touch-hit-rects-iframes.html [ Skip ]
 crbug.com/520170 fast/dom/timer-throttling-hidden-page.html [ Failure Pass ]
 crbug.com/652536 fast/events/mouse-cursor-change-after-image-load.html [ Failure Pass Crash ]
 crbug.com/652536 virtual/mouseevent_fractional/fast/events/mouse-cursor-change-after-image-load.html [ Failure Pass Crash ]

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-global-expected.txt

 This tests verifies the hit test regions given to the compositor in the simple case where touch handles cover (or nearly cover) the entire document. It can only be run in DumpRenderTree.
 
-document: #document scrolling (0, 0, 800, 600)
-document: #document scrolling (0, 600, 785, 1400)
+document: #document (0, 0, 800, 600)
 
-html: #document scrolling (0, 0, 785, 2000)
+html: #document (0, 0, 800, 600)
 
-body: #document scrolling (5, 16, 775, 1968)
+body: #document (0, 0, 800, 600)
 
 webPageOverlay: no rects
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-many-expected.txt

 Tests that there is an upper limit on the number of hit rects generated per layer. http://crbug.com/299177.
 
 Test node has 99 children with 100 rects
-Test node has 100 children with 101 rects
-FAIL - got 101 rects, expected 1.
-Test node has 101 children with 102 rects
-FAIL - got 102 rects, expected 1.
-manychildren: DIV#layer (0, 0, 290, 12)
-manychildren: DIV#layer (301, 21, 7, 7)
-manychildren: DIV#layer (301, 33, 7, 7)
-manychildren: DIV#layer (301, 45, 7, 7)
-manychildren: DIV#layer (301, 57, 7, 7)
-manychildren: DIV#layer (301, 69, 7, 7)
-manychildren: DIV#layer (301, 81, 7, 7)
-manychildren: DIV#layer (301, 93, 7, 7)
-manychildren: DIV#layer (301, 105, 7, 7)
-manychildren: DIV#layer (301, 117, 7, 7)
-manychildren: DIV#layer (301, 129, 7, 7)
-manychildren: DIV#layer (301, 141, 7, 7)
-manychildren: DIV#layer (301, 153, 7, 7)
-manychildren: DIV#layer (301, 165, 7, 7)
-manychildren: DIV#layer (301, 177, 7, 7)
-manychildren: DIV#layer (301, 189, 7, 7)
-manychildren: DIV#layer (301, 201, 7, 7)
-manychildren: DIV#layer (301, 213, 7, 7)
-manychildren: DIV#layer (301, 225, 7, 7)
-manychildren: DIV#layer (301, 237, 7, 7)
-manychildren: DIV#layer (301, 249, 7, 7)
-manychildren: DIV#layer (301, 261, 7, 7)
-manychildren: DIV#layer (301, 273, 7, 7)
-manychildren: DIV#layer (301, 285, 7, 7)
-manychildren: DIV#layer (301, 297, 7, 7)
-manychildren: DIV#layer (301, 309, 7, 7)
-manychildren: DIV#layer (301, 321, 7, 7)
-manychildren: DIV#layer (301, 333, 7, 7)
-manychildren: DIV#layer (301, 345, 7, 7)
-manychildren: DIV#layer (301, 357, 7, 7)
-manychildren: DIV#layer (301, 369, 7, 7)
-manychildren: DIV#layer (301, 381, 7, 7)
-manychildren: DIV#layer (301, 393, 7, 7)
-manychildren: DIV#layer (301, 405, 7, 7)
-manychildren: DIV#layer (301, 417, 7, 7)
-manychildren: DIV#layer (301, 429, 7, 7)
-manychildren: DIV#layer (301, 441, 7, 7)
-manychildren: DIV#layer (301, 453, 7, 7)
-manychildren: DIV#layer (301, 465, 7, 7)
-manychildren: DIV#layer (301, 477, 7, 7)
-manychildren: DIV#layer (301, 489, 7, 7)
-manychildren: DIV#layer (301, 501, 7, 7)
-manychildren: DIV#layer (301, 513, 7, 7)
-manychildren: DIV#layer (301, 525, 7, 7)
-manychildren: DIV#layer (301, 537, 7, 7)
-manychildren: DIV#layer (301, 549, 7, 7)
-manychildren: DIV#layer (301, 561, 7, 7)
-manychildren: DIV#layer (301, 573, 7, 7)
-manychildren: DIV#layer (301, 585, 7, 7)
-manychildren: DIV#layer (301, 597, 7, 7)
-manychildren: DIV#layer (301, 609, 7, 7)
-manychildren: DIV#layer (301, 621, 7, 7)
-manychildren: DIV#layer (301, 633, 7, 7)
-manychildren: DIV#layer (301, 645, 7, 7)
-manychildren: DIV#layer (301, 657, 7, 7)
-manychildren: DIV#layer (301, 669, 7, 7)
-manychildren: DIV#layer (301, 681, 7, 7)
-manychildren: DIV#layer (301, 693, 7, 7)
-manychildren: DIV#layer (301, 705, 7, 7)
-manychildren: DIV#layer (301, 717, 7, 7)
-manychildren: DIV#layer (301, 729, 7, 7)
-manychildren: DIV#layer (301, 741, 7, 7)
-manychildren: DIV#layer (301, 753, 7, 7)
-manychildren: DIV#layer (301, 765, 7, 7)
-manychildren: DIV#layer (301, 777, 7, 7)
-manychildren: DIV#layer (301, 789, 7, 7)
-manychildren: DIV#layer (301, 801, 7, 7)
-manychildren: DIV#layer (301, 813, 7, 7)
-manychildren: DIV#layer (301, 825, 7, 7)
-manychildren: DIV#layer (301, 837, 7, 7)
-manychildren: DIV#layer (301, 849, 7, 7)
-manychildren: DIV#layer (301, 861, 7, 7)
-manychildren: DIV#layer (301, 873, 7, 7)
-manychildren: DIV#layer (301, 885, 7, 7)
-manychildren: DIV#layer (301, 897, 7, 7)
-manychildren: DIV#layer (301, 909, 7, 7)
-manychildren: DIV#layer (301, 921, 7, 7)
-manychildren: DIV#layer (301, 933, 7, 7)
-manychildren: DIV#layer (301, 945, 7, 7)
-manychildren: DIV#layer (301, 957, 7, 7)
-manychildren: DIV#layer (301, 969, 7, 7)
-manychildren: DIV#layer (301, 981, 7, 7)
-manychildren: DIV#layer (301, 993, 7, 7)
-manychildren: DIV#layer (301, 1005, 7, 7)
-manychildren: DIV#layer (301, 1017, 7, 7)
-manychildren: DIV#layer (301, 1029, 7, 7)
-manychildren: DIV#layer (301, 1041, 7, 7)
-manychildren: DIV#layer (301, 1053, 7, 7)
-manychildren: DIV#layer (301, 1065, 7, 7)
-manychildren: DIV#layer (301, 1077, 7, 7)
-manychildren: DIV#layer (301, 1089, 7, 7)
-manychildren: DIV#layer (301, 1101, 7, 7)
-manychildren: DIV#layer (301, 1113, 7, 7)
-manychildren: DIV#layer (301, 1125, 7, 7)
-manychildren: DIV#layer (301, 1137, 7, 7)
-manychildren: DIV#layer (301, 1149, 7, 7)
-manychildren: DIV#layer (301, 1161, 7, 7)
-manychildren: DIV#layer (301, 1173, 7, 7)
-manychildren: DIV#layer (301, 1185, 7, 7)
-manychildren: DIV#layer (301, 1197, 7, 7)
-manychildren: DIV#layer (301, 1209, 7, 7)
-manychildren: DIV#layer (301, 1221, 7, 7)
+Test node has 100 children with 1 rects
+Test node has 101 children with 1 rects
+manychildren: DIV#layer (0, 0, 308, 1228)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-non-composited-scroll-expected.txt

 This test verifies the hit test regions given to the compositor specifically around non-composited overflow scroll elements.
 
-scrollContent: #document scrolling (14, 63, 273, 12)
+scrollContent: #document scrolling (13, 52, 290, 32)
 
 scrollContainerWithHandler: #document scrolling (13, 89, 290, 32)
 
-nestedContent: #document scrolling (15, 148, 256, 9)
+nestedContent: #document scrolling (13, 126, 290, 32)
+nestedContent: #document scrolling (15, 158, 256, 2)
 
-fixedPositionContentContainer: #document scrolling (14, 179, 273, 12)
+fixedPositionContentContainer: #document scrolling (13, 168, 290, 32)
 fixedPositionContentContainer: #document scrolling (310, 190, 132, 12)
 
-overflowwithhandler: #document scrolling (14, 221, 273, 20)
+overflowwithhandler: #document scrolling (13, 210, 290, 32)
+overflowwithhandler: #document scrolling (14, 242, 273, 6)
 
-divInsideNonScrollableLayer: #document scrolling (14, 273, 273, 10)
+divInsideNonScrollableLayer: #document scrolling (13, 252, 290, 32)
+divInsideNonScrollableLayer: #document scrolling (14, 284, 273, 1)
 
 divInsideCompositedLayer: DIV#compositedLayer (0, 10, 273, 12)
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-non-composited-scroll-overflow-with-handler-expected.txt

-notclipped: #document scrolling (1, 51, 200, 25)
+notclipped: #document scrolling (0, 0, 302, 102)
 
-clipped: no rects
+clipped: #document scrolling (0, 0, 302, 102)
+clipped: #document scrolling (1, 176, 200, 25)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-scroll-expected.txt

 This test verifies the hit test regions given to the compositor specifically around composited overflow scroll elements.
 
-scrollContent: DIV#scroll1 scrolling (0, 13, 273, 12)
+scrollContent: DIV#scroll1 (1, 14, 273, 12)
 
-scrollContent5: DIV#scroll5 scrolling (0, 13, 273, 12)
+scrollContent5: DIV#scroll5 (1, 14, 273, 12)
 
 scrollContent6: DIV#scroll6 scrolling[-1,-14] (0, 0, 273, 12)
 
-nestedContent: DIV#scroll2b scrolling (0, 30, 256, 12)
+nestedContent: DIV#scroll2b (1, 31, 256, 12)
 
-overflowwithhandler: DIV#overflowwithhandler scrolling (0, 0, 256, 116)
-overflowwithhandler: DIV#overflowwithhandler (0, 0, 273, 52)
+overflowwithhandler: DIV#overflowwithhandler (1, 1, 256, 116)
+overflowwithhandler: DIV#scroll4 (1, 11, 273, 52)
 
-overflowwithborder: DIV#overflowwithborder (0, 0, 290, 70)
-overflowwithborder: DIV#overflowwithborder scrolling (4, 4, 255, 116)
+overflowwithborder: DIV#overflowwithborder (6, 6, 263, 124)
+overflowwithborder: HTML (13, 365, 290, 70)
 
 withTransform: DIV#transformed (0, 0, 271, 12)
-withTransform: DIV#scroll3 scrolling (0, 13, 273, 14)
+withTransform: DIV#scroll3 (1, 14, 273, 14)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-svg-container-expected.txt

-: #document scrolling (8, 14, 54, 18)
+: #document scrolling (8, 8, 100, 100)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-svg-expected.txt

 This tests verifies the hit test regions given to the compositor for svg elements. It can only be run in DumpRenderTree.
 
-svgline: #document scrolling (13, 84, 22, 3)
+svgline: #document scrolling (13, 80, 100, 10)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-svg-image-expected.txt

-: #document scrolling (8, 8, 20, 20)
+: #document scrolling (8, 8, 100, 100)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-svg-root-expected.txt

-: #document scrolling (9, 9, 51, 52)
+: #document scrolling (8, 8, 53, 54)
 
 

third_party/WebKit/LayoutTests/fast/events/touch/compositor-touch-hit-rects-svg-text-expected.txt

-: #document scrolling (8, 14, 54, 18)
+: #document scrolling (8, 8, 54, 1)
 
 

third_party/WebKit/LayoutTests/fullscreen/compositor-touch-hit-rects-fullscreen-video-controls-expected.txt

 This test makes sure that touch hit rects are reported for fullscreen HTML5 video control elements even when there is a document handler.
 
 Should have single rect on document before fullscreen
-handler: #document scrolling (0, 0, 800, 600)
+handler: #document (0, 0, 800, 600)
 
 EVENT(webkitfullscreenchange)
 Should keep rect on document
-handler: INPUT (0, 0, 130, 130)
-handler: DIV (0, 0, 800, 600)
-handler: DIV (0, 0, 800, 600)
-handler: #document scrolling (0, 0, 800, 600)
-handler: DIV[19,19] (19, 19, 90, 90)
+handler: #document (0, 0, 800, 600)
 
 END OF TEST
 

third_party/WebKit/LayoutTests/platform/linux/fast/events/touch/compositor-touch-hit-rects-svg-container-expected.txt

-: #document scrolling (8, 13, 54, 19)
-
-

third_party/WebKit/LayoutTests/platform/linux/fast/events/touch/compositor-touch-hit-rects-svg-text-expected.txt

-: #document scrolling (8, 13, 54, 19)
-
-

third_party/WebKit/LayoutTests/platform/linux/virtual/android/fullscreen/compositor-touch-hit-rects-fullscreen-video-controls-expected.txt

 This test makes sure that touch hit rects are reported for fullscreen HTML5 video control elements even when there is a document handler.
 
 Should have single rect on document before fullscreen
-handler: #document scrolling (0, 0, 800, 600)
+handler: #document (0, 0, 800, 600)
 
 EVENT(webkitfullscreenchange)
 Should report no rect or another rect which is not on the document
-handler: INPUT (0, 0, 130, 130)
-handler: DIV (0, 0, 800, 600)
-handler: DIV (0, 0, 800, 600)
-handler: DIV[19,19] (19, 19, 90, 90)
+handler: no rects
 
 END OF TEST
 

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -908,7 +908,6 @@
     // Compute touch action rects in paint instead of ScrollingCoordinator.
     {
       name: "PaintTouchActionRects",
-      status: "stable",
     },
     // PaintTracking enables the Largest Text Paint metric, Last Text Paint
     // metric, Largest Image Paint metric and Last Image Paint metric.