Invalidate paint properties on paint offset changes

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) animations/ [ Skip ]
 Bug(none) app_banner/ [ Skip ]
 Bug(none) battery-status/ [ Skip ]
 Bug(none) bindings/ [ Skip ]
 Bug(none) bluetooth/ [ Skip ]
@@ skipping 2135 matching lines @@
 crbug.com/654554 fast/forms/suggestion-picker/week-suggestion-picker-appearance.html [ Crash Timeout ]
 
 crbug.com/667071 svg/foreignObject/vertical-foreignObject.html [ Failure ]
 
 Bug(none) fast/deprecated-flexbox/009-horizontal.html [ Failure ]
 Bug(none) fast/deprecated-flexbox/009.html [ Failure ]
 Bug(none) fast/overflow/003.xml [ Failure ]
 Bug(none) fast/overflow/overflow-float-stacking.html [ Failure ]
 Bug(none) fast/overflow/overflow-stacking.html [ Failure ]
 
+# Paint property under-invalidation for clip changes needs investigation.
+crbug.com/645667 compositing/clip-change.html [ Failure ]
+crbug.com/645667 compositing/layer-creation/iframe-clip-removed.html [ Failure ]
+
 # Notes about rebaselined tests:
 #
 # Rebaselined for small pixel differences.
 # compositing/geometry/layer-due-to-layer-children-deep.html
 #
 # Rebaselined because GeometryMapper applies a control clip for the input element; SPv1 does not.
 # fast/css/input-search-padding.html
 # fast/forms/search/search-vertical-alignment.html
 # fast/forms/search/searchfield-heights.html
 # fast/forms/text/text-font-height-mismatch.html
 # fast/forms/text/textfield-overflow-by-value-update.html
 # fast/replaced/width100percent-searchfield.html
 #
 # SPv2 correctly positions a background clip that includes the transformed size of div #two.
 # SPv1 does not understand how to apply transforms properly in PaintLayerClipper (the issue is
 # also tracked in crbug.com/548184).
 # transforms/transform-overflow.html