Experimental: Change LazyReattachIfAttached to SetChildNeedsStyleRecalc

third_party/WebKit/Source/core/dom/shadow/ElementShadow.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 65 matching lines @@
     element_shadow_v0_ = ElementShadowV0::Create(*this);
   }
 
   ShadowRoot* shadow_root = ShadowRoot::Create(shadow_host.GetDocument(), type);
   shadow_root->SetParentOrShadowHostNode(&shadow_host);
   shadow_root->SetParentTreeScope(shadow_host.GetTreeScope());
   AppendShadowRoot(*shadow_root);
   if (type == ShadowRootType::V0) {
     SetNeedsDistributionRecalc();
   } else {
-    for (Node& child : NodeTraversal::ChildrenOf(shadow_host))
-      child.LazyReattachIfAttached();
+    for (Node& child : NodeTraversal::ChildrenOf(shadow_host)) {
+      child.SetNeedsStyleRecalc(
+          kSubtreeStyleChange,
+          StyleChangeReasonForTracing::Create(StyleChangeReason::kShadow));
+    }
   }
 
   shadow_root->InsertedInto(&shadow_host);
   shadow_host.SetChildNeedsStyleRecalc();
   shadow_host.SetNeedsStyleRecalc(
       kSubtreeStyleChange,
       StyleChangeReasonForTracing::Create(StyleChangeReason::kShadow));
 
   probe::didPushShadowRoot(&shadow_host, shadow_root);
 
@@ skipping 72 matching lines @@
   visitor->Trace(element_shadow_v0_);
   visitor->Trace(shadow_root_);
 }
 
 DEFINE_TRACE_WRAPPERS(ElementShadow) {
   visitor->TraceWrappers(element_shadow_v0_);
   visitor->TraceWrappers(shadow_root_);
 }
 
 }  // namespace blink