Revert 157422 "Remove lots of code related synchronously attaching"

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1306 matching lines @@
     // We've already been through detach when doing a lazyAttach, but we might
     // need to clear any state that's been added since then.
     if (hasRareData() && styleChangeType() == LazyAttachStyleChange) {
         ElementRareData* data = elementRareData();
         data->clearComputedStyle();
         data->resetDynamicRestyleObservations();
         if (!context.resolvedStyle)
             data->resetStyleState();
     }
 
+    // FIXME: Remove this once we lazyAttach everywhere.
+    if (!document().inStyleRecalc() && (this == document().documentElement() || this == document().body()))
+        document().setNeedsStyleRecalc(LocalStyleChange);
+
     NodeRenderingContext(this, context.resolvedStyle).createRendererForElementIfNeeded();
 
     createPseudoElementIfNeeded(BEFORE);
 
     // When a shadow root exists, it does the work of attaching the children.
     if (ElementShadow* shadow = this->shadow()) {
         parentPusher.push();
         shadow->attach(context);
     } else if (firstChild())
         parentPusher.push();
 
     ContainerNode::attach(context);
 
     createPseudoElementIfNeeded(AFTER);
     createPseudoElementIfNeeded(BACKDROP);
 
     if (hasRareData()) {
         ElementRareData* data = elementRareData();
         if (data->needsFocusAppearanceUpdateSoonAfterAttach()) {
             if (isFocusable() && document().focusedElement() == this)
                 document().updateFocusAppearanceSoon(false /* don't restore selection */);
             data->setNeedsFocusAppearanceUpdateSoonAfterAttach(false);
         }
     }
 
-    InspectorInstrumentation::didRecalculateStyleForElement(this);
+    // FIXME: It doesn't appear safe to call didRecalculateStyleForElement when
+    // not in a Document::recalcStyle. Since we're hopefully going to always
+    // lazyAttach in the future that problem should go away.
+    if (document().inStyleRecalc())
+        InspectorInstrumentation::didRecalculateStyleForElement(this);
 }
 
 void Element::unregisterNamedFlowContentNode()
 {
     if (RuntimeEnabledFeatures::cssRegionsEnabled() && inNamedFlow() && document().renderView())
         document().renderView()->flowThreadController()->unregisterNamedFlowContentNode(this);
 }
 
 void Element::detach(const AttachContext& context)
 {
@@ skipping 388 matching lines @@
 void Element::removeAllEventListeners()
 {
     ContainerNode::removeAllEventListeners();
     if (ElementShadow* shadow = this->shadow())
         shadow->removeAllEventListeners();
 }
 
 void Element::beginParsingChildren()
 {
     clearIsParsingChildrenFinished();
+    StyleResolver* styleResolver = document().styleResolverIfExists();
+    if (styleResolver && attached())
+        styleResolver->pushParentElement(this);
 }
 
 void Element::finishParsingChildren()
 {
+    ContainerNode::finishParsingChildren();
     setIsParsingChildrenFinished();
     checkForSiblingStyleChanges(this, renderStyle(), true, lastChild(), 0, 0);
+    if (StyleResolver* styleResolver = document().styleResolverIfExists())
+        styleResolver->popParentElement(this);
     if (isCustomElement())
         CustomElement::didFinishParsingChildren(this);
 }
 
 #ifndef NDEBUG
 void Element::formatForDebugger(char* buffer, unsigned length) const
 {
     StringBuilder result;
     String s;
 
@@ skipping 1847 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore