Hide AXPlatformNode on ChromeOS.

ui/views/view.h

 // Copyright (c) 2012 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 UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 54 matching lines @@
 
 namespace views {
 
 class Background;
 class Border;
 class ContextMenuController;
 class DragController;
 class FocusManager;
 class FocusTraversable;
 class LayoutManager;
-class NativeViewAccessibility;
+class NativeViewAccessibilityBase;
 class ScrollView;
 class ViewObserver;
 class Widget;
 class WordLookupClient;
 
 namespace internal {
 class PreEventDispatchHandler;
 class PostEventDispatchHandler;
 class RootView;
 class ScopedChildrenLock;
@@ skipping 1542 matching lines @@
 
   DragController* drag_controller_;
 
   // Input  --------------------------------------------------------------------
 
   std::unique_ptr<ViewTargeter> targeter_;
 
   // Accessibility -------------------------------------------------------------
 
   // The accessibility element used to represent this View.
-  std::unique_ptr<NativeViewAccessibility> native_view_accessibility_;
+  std::unique_ptr<NativeViewAccessibilityBase> native_view_accessibility_;
 
   // Observers -------------------------------------------------------------
 
   base::ObserverList<ViewObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_