Revert "Enable chrome.automation.getDesktop on all aura platforms."

chrome/browser/ui/aura/accessibility/ax_root_obj_wrapper.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 CHROME_BROWSER_UI_AURA_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_
-#define CHROME_BROWSER_UI_AURA_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "ui/views/accessibility/ax_aura_obj_wrapper.h"
-
-namespace aura {
-class Window;
-}  // namespace aura
-
-class AXRootObjWrapper : public views::AXAuraObjWrapper {
- public:
-  explicit AXRootObjWrapper(int32 id);
-  ~AXRootObjWrapper() override;
-
-  // Returns an AXAuraObjWrapper for an alert window with title set to |text|.
-  views::AXAuraObjWrapper* GetAlertForText(const std::string& text);
-
-  // Convenience method to check for existence of a child.
-  bool HasChild(views::AXAuraObjWrapper* child);
-
-  // views::AXAuraObjWrapper overrides.
-  views::AXAuraObjWrapper* GetParent() override;
-  void GetChildren(
-      std::vector<views::AXAuraObjWrapper*>* out_children) override;
-  void Serialize(ui::AXNodeData* out_node_data) override;
-  int32 GetID() override;
-
- private:
-  int32 id_;
-
-  aura::Window* alert_window_;
-
-  DISALLOW_COPY_AND_ASSIGN(AXRootObjWrapper);
-};
-
-#endif  // CHROME_BROWSER_UI_AURA_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_