[SPv2] Skip several failing virtual test suites for now

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ia7a97eefa81c7279d12e2827fedb6765fc866d65
Reviewed-on: https://chromium-review.googlesource.com/1112205
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569665}

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

@@ -67,6 +67,7 @@ Bug(none) webmidi/ [ Skip ]
 Bug(none) xmlviewer/ [ Skip ]
 
 Bug(none) virtual/android/ [ Skip ]
+Bug(none) virtual/blink-gen-property-trees/ [ Skip ]
 Bug(none) virtual/enable_asmjs/ [ Skip ]
 Bug(none) virtual/enable_wasm/ [ Skip ]
 Bug(none) virtual/exotic-color-space/ [ Skip ]
@@ -81,7 +82,9 @@ Bug(none) virtual/mouseevent_fractional/ [ Skip ]
 Bug(none) virtual/mse-1mb-buffers/ [ Skip ]
 Bug(none) virtual/new-remote-playback-pipeline/ [ Skip ]
 Bug(none) virtual/outofblink-cors/ [ Skip ]
+Bug(none) virtual/picture-in-picture/ [ Skip ]
 Bug(none) virtual/prefer_compositing_to_lcd_text/ [ Skip ]
+Bug(none) virtual/reporting-api/ [ Skip ]
 Bug(none) virtual/scalefactor150/ [ Skip ]
 Bug(none) virtual/scalefactor200/ [ Skip ]
 Bug(none) virtual/scalefactor200withzoom/ [ Skip ]
@@ -89,12 +92,12 @@ Bug(none) virtual/scroll_customization/ [ Skip ]
 Bug(none) virtual/spv2/ [ Skip ]
 Bug(none) virtual/stable/ [ Skip ]
 Bug(none) virtual/targetedstylerecalc/ [ Skip ]
+Bug(none) virtual/unified-autoplay/ [ Skip ]
+Bug(none) virtual/user-activation-v2/ [ Skip ]
 Bug(none) virtual/video-surface-layer/ [ Skip ]
-Bug(none) virtual/reporting-api/ [ Skip ]
 Bug(none) virtual/wheelscrolllatching/ [ Skip ]
 Bug(none) virtual/windows-directwrite/ [ Skip ]
 Bug(none) virtual/without-smil/ [ Skip ]
-Bug(none) virtual/blink-gen-property-trees/ [ Skip ]
 
 crbug.com/778875 virtual/threaded/fast/animationworklet/ [ Skip ]
 crbug.com/841567 virtual/threaded/fast/scrolling [ Skip ]