Re-land: Initial skeleton of Accessibility Object Model Phase 1

third_party/WebKit/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)
  *
@@ skipping 1169 matching lines @@
   return cache->get()->computedRoleForNode(this);
 }
 
 String Element::computedName() {
   document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);
   std::unique_ptr<ScopedAXObjectCache> cache =
       ScopedAXObjectCache::create(document());
   return cache->get()->computedNameForNode(this);
 }
 
+AccessibleNode* Element::existingAccessibleNode() const {
+  if (!RuntimeEnabledFeatures::accessibilityObjectModelEnabled())
+    return nullptr;
+
+  if (!hasRareData())
+    return nullptr;
+
+  return elementRareData()->accessibleNode();
+}
+
+AccessibleNode* Element::accessibleNode() {
+  if (!RuntimeEnabledFeatures::accessibilityObjectModelEnabled())
+    return nullptr;
+
+  ElementRareData& rareData = ensureElementRareData();
+  return rareData.ensureAccessibleNode(this);
+}
+
 const AtomicString& Element::getAttribute(const AtomicString& localName) const {
   if (!elementData())
     return nullAtom;
   synchronizeAttribute(localName);
   if (const Attribute* attribute = elementData()->attributes().find(
           localName, shouldIgnoreAttributeCase()))
     return attribute->value();
   return nullAtom;
 }
 
@@ skipping 3052 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(Element) {
   if (hasRareData()) {
     visitor->traceWrappers(elementRareData());
   }
   ContainerNode::traceWrappers(visitor);
 }
 
 }  // namespace blink