Use invalidation sets for :-webkit-drag.

third_party/WebKit/Source/core/layout/LayoutObject.cpp

Index: third_party/WebKit/Source/core/layout/LayoutObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.cpp b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
index 88f9593e03e18c085f3329cf3ab2eac33233db9e..c25d52a34da153cea6b8ef6b278dd18aa8670366 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.cpp
@@ -2685,7 +2685,7 @@ void LayoutObject::updateDragState(bool dragOn)
     setIsDragging(dragOn);
     if (valueChanged && node()) {
         if (node()->isElementNode() && toElement(node())->childrenOrSiblingsAffectedByDrag())
-            node()->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Drag));
+            document().styleEngine().pseudoStateChangedForElement(CSSSelector::PseudoDrag, *toElement(node()));
         else if (style()->affectedByDrag())
             node()->setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Drag));
     }