Revert of Show ancestor hierarchy in accessibility panel

third_party/WebKit/Source/modules/accessibility/InspectorAccessibilityAgent.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef InspectorAccessibilityAgent_h
 #define InspectorAccessibilityAgent_h
 
 #include "core/inspector/InspectorBaseAgent.h"
 #include "core/inspector/protocol/Accessibility.h"
 #include "modules/ModulesExport.h"
 
 namespace blink {
 
-class AXObjectCacheImpl;
 class InspectorDOMAgent;
-class LocalFrame;
 class Page;
 
 class MODULES_EXPORT InspectorAccessibilityAgent : public InspectorBaseAgent<protocol::Accessibility::Metainfo> {
     WTF_MAKE_NONCOPYABLE(InspectorAccessibilityAgent);
 public:
     InspectorAccessibilityAgent(Page*, InspectorDOMAgent*);
 
     // Base agent methods.
     DECLARE_VIRTUAL_TRACE();
 
     // Protocol methods.
-    void getAXNodeChain(ErrorString*, int domNodeId, bool fetchAncestors, std::unique_ptr<protocol::Array<protocol::Accessibility::AXNode>>*) override;
+    void getAXNode(ErrorString*, int nodeId, Maybe<protocol::Accessibility::AXNode>* accessibilityNode) override;
 
 private:
     Member<Page> m_page;
     Member<InspectorDOMAgent> m_domAgent;
 };
 
 } // namespace blink
 
 #endif // InspectorAccessibilityAgent_h