Remove begin/end subseq. display items, and store on PaintController instead.

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

 # Expectations for slimming paint v2
 # See: https://docs.google.com/document/d/1QCM912Dr6u38DqyQqd7pxQxDy8FFOoWMMDq7uAXqKdA/view
 # We are focused on fast/, compositing/, and svg/ with all other directories skipped (for now).
 
 Bug(none) accessibility/ [ Skip ]
 Bug(none) app_banner/ [ Skip ]
 Bug(none) battery-status/ [ Skip ]
 Bug(none) bindings/ [ Skip ]
 Bug(none) bluetooth/ [ Skip ]
 Bug(none) canvas/ [ Skip ]
@@ skipping 92 matching lines @@
 Bug(none) virtual/sharedarraybuffer/ [ Skip ]
 Bug(none) virtual/spv2/ [ Skip ]
 Bug(none) virtual/stable/ [ Skip ]
 Bug(none) virtual/targetedstylerecalc/ [ Skip ]
 Bug(none) virtual/wheelscrolllatching/ [ Skip ]
 Bug(none) virtual/windows-directwrite/ [ Skip ]
 Bug(none) virtual/without-smil/ [ Skip ]
 
 Bug(none) compositing/3d-cube.html [ Failure ]
 Bug(none) compositing/absolute-inside-out-of-view-fixed.html [ Failure ]
+Bug(none) compositing/always-composite-fixed-position-when-descendants-composite.html [ Failure ]
 Bug(none) compositing/animation/hidden-composited.html [ Failure ]
 Bug(none) compositing/backface-visibility/backface-visibility-image.html [ Failure ]
 Bug(none) compositing/backface-visibility/backface-visibility-webgl.html [ Failure ]
 Bug(none) compositing/background-color/background-color-outside-document.html [ Crash Timeout ]
 Bug(none) compositing/canvas-with-object-fit-contain-in-composited-layer.html [ Failure ]
 Bug(none) compositing/change-preferCompositingToLCDText-setting.html [ Failure ]
 Bug(none) compositing/clip-child-by-non-stacking-ancestor.html [ Failure ]
 Bug(none) compositing/color-matching/image-color-matching.html [ Failure ]
 Bug(none) compositing/columns/composited-in-paginated.html [ Failure ]
 Bug(none) compositing/contents-opaque/background-clip.html [ Failure ]
@@ skipping 1229 matching lines @@
 Bug(none) virtual/threaded/animations/element-animate-positive-delay.html [ Crash ]
 Bug(none) virtual/threaded/animations/img-element-transform.html [ Crash ]
 Bug(none) virtual/threaded/animations/inline-block-transform.html [ Crash ]
 crbug.com/702379 virtual/threaded/animations/skew-notsequential-compositor.html [ Failure ]
 crbug.com/692310 virtual/threaded/animations/sample-on-last-keyframe.html [ Timeout ]
 Bug(none) virtual/threaded/animations/transitions-retarget.html [ Crash ]
 crbug.com/692310 virtual/threaded/animations/zoom-responsive-transform-animation.html [ Timeout ]
 crbug.com/692310 virtual/threaded/transitions/opacity-transition-zindex.html [ Timeout ]
 crbug.com/692310 virtual/threaded/transitions/unprefixed-transform.html [ Timeout ]
 
+Bug(none) virtual/threaded/animations/3d/change-transform-in-end-event.html [ Failure ]
+Bug(none) virtual/threaded/animations/composited-pseudo-element-animation.html [ Failure ]
+Bug(none) virtual/threaded/animations/css-composite-animation-affects-use-elements.html [ Failure ]
+Bug(none) virtual/threaded/transitions/transition-end-event-rendering.html [ Failure ]
+
 # Compositor Worker logic has not yet been fully ported to SPv2.
 crbug.com/686897 virtual/threaded/fast/compositorworker/compositor-attribute-change-worker.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/compositor-proxy-disconnect-worker.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/visual-update.html [ Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/basic-plumbing-main-to-worker.html [ Crash Failure Timeout ]
 crbug.com/686897 virtual/threaded/fast/compositorworker/basic-plumbing-worker-to-main.html [ Crash Failure Timeout ]
 
 # virtual/threaded variants of sub-directories and tests already skipped or marked as failing above.
 Bug(none) virtual/threaded/inspector/ [ Skip ]
 Bug(none) virtual/threaded/fast/scroll-behavior/ [ Skip ]
 Bug(none) virtual/threaded/compositing/visibility/layer-visible-content.html [ Failure ]
 Bug(none) virtual/threaded/compositing/visibility/overlays.html [ Failure Crash ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-image-layers-dynamic.html [ Crash Failure ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-image-layers.html [ Failure ]
 Bug(none) virtual/threaded/compositing/visibility/visibility-simple-video-layer.html [ Failure ]
 Bug(none) virtual/threaded/compositing/webgl/webgl-reflection.html [ Failure ]
 Bug(none) virtual/threaded/printing/ [ Skip ]
 
 # Tests that fail after changes to border dash painting, due to antialiasing differences
 # and minor border radius clipping differences. Some SPv2 change is being ticked by the border
 # painting code.
 Bug(700530) fast/css/background-clip-values.html [ Failure ]
 Bug(700530) svg/text/small-fonts-in-html5.html [ Failure ]
 Bug(700530) compositing/overflow/paint-neg-z-order-descendants-into-scrolling-contents-layer.html [ Failure ]
 Bug(700530) fast/multicol/tall-content-in-inner-with-fixed-height.html [ Failure ]
 Bug(700530) compositing/geometry/abs-position-inside-opacity.html [ Failure ]
 Bug(700530) fast/css3-text/css3-text-decoration/text-underline-position/text-underline-position-cjk.html [ Failure ]