Revert of Cross-process iframe accessibility.

content/renderer/accessibility/blink_ax_tree_source.h

 // Copyright 2014 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 CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
 #define CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_
 
 #include "third_party/WebKit/public/web/WebAXObject.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/accessibility/ax_tree_source.h"
 
 namespace content {
 
 class RenderFrameImpl;
 
 class BlinkAXTreeSource
     : public ui::AXTreeSource<blink::WebAXObject> {
  public:
   BlinkAXTreeSource(RenderFrameImpl* render_frame);
   virtual ~BlinkAXTreeSource();
 
-  // Call this to have BlinkAXTreeSource collect a mapping from
-  // node ids to the frame routing id for an out-of-process iframe during
-  // calls to SerializeNode.
-  void CollectChildFrameIdMapping(
-      std::map<int32, int>* node_to_frame_routing_id_map);
-
   // Walks up the ancestor chain to see if this is a descendant of the root.
   bool IsInTree(blink::WebAXObject node) const;
 
   // AXTreeSource implementation.
   virtual blink::WebAXObject GetRoot() const OVERRIDE;
   virtual blink::WebAXObject GetFromId(int32 id) const OVERRIDE;
   virtual int32 GetId(blink::WebAXObject node) const OVERRIDE;
   virtual void GetChildren(
       blink::WebAXObject node,
       std::vector<blink::WebAXObject>* out_children) const OVERRIDE;
   virtual blink::WebAXObject GetParent(blink::WebAXObject node) const
       OVERRIDE;
   virtual void SerializeNode(blink::WebAXObject node,
                              ui::AXNodeData* out_data) const OVERRIDE;
   virtual bool IsValid(blink::WebAXObject node) const OVERRIDE;
   virtual bool IsEqual(blink::WebAXObject node1,
                        blink::WebAXObject node2) const OVERRIDE;
   virtual blink::WebAXObject GetNull() const OVERRIDE;
 
   blink::WebDocument GetMainDocument() const;
 
  private:
   RenderFrameImpl* render_frame_;
-  std::map<int32, int>* node_to_frame_routing_id_map_;
-
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_ACCESSIBILITY_BLINK_AX_TREE_SOURCE_H_