Introduce AXObjectCacheBase in core/ and remove WebNode dependency

third_party/WebKit/Source/web/WebNode.cpp

 /*
  * Copyright (C) 2009 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "public/web/WebNode.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "core/dom/AXObjectCacheBase.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/dom/NodeList.h"
 #include "core/dom/StaticNodeList.h"
 #include "core/dom/TagCollection.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/serializers/Serialization.h"
 #include "core/events/Event.h"
@@ skipping 147 matching lines @@
   return nullptr;
 }
 
 WebPluginContainer* WebNode::PluginContainer() const {
   return PluginContainerFromNode(ConstUnwrap<Node>());
 }
 
 WebAXObject WebNode::AccessibilityObject() {
   WebDocument web_document = GetDocument();
   const Document* doc = GetDocument().ConstUnwrap<Document>();
-  AXObjectCacheImpl* cache = ToAXObjectCacheImpl(doc->ExistingAXObjectCache());
+  AXObjectCacheBase* cache = ToAXObjectCacheBase(doc->ExistingAXObjectCache());
   Node* node = Unwrap<Node>();
   return cache ? WebAXObject(cache->Get(node)) : WebAXObject();
 }
 
 WebNode::WebNode(Node* node) : private_(node) {}
 
 WebNode& WebNode::operator=(Node* node) {
   private_ = node;
   return *this;
 }
 
 WebNode::operator Node*() const {
   return private_.Get();
 }
 
 }  // namespace blink