Revert "Enforce clearing renderers' paint invalidation state"

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index e64409dae9d267488180fecadf3e4268a53d5270..8dda7f577f8695331ed04bbf4992cbd1e1e8631e 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -3395,10 +3395,6 @@ bool RenderObject::isRelayoutBoundaryForInspector() const
 
 void RenderObject::clearPaintInvalidationState()
 {
-    // paintInvalidationStateIsDirty should be kept in sync with the
-    // booleans that are cleared below.
-    ASSERT(paintInvalidationStateIsDirty());
-
     setShouldDoFullPaintInvalidationAfterLayout(false);
     setShouldDoFullPaintInvalidationIfSelfPaintingLayer(false);
     setOnlyNeededPositionedMovementLayout(false);