Revert of Send Windows accessibility events based on tree updates.

content/browser/accessibility/browser_accessibility_manager_win.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 
 #include <oleacc.h>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
 
   static ui::AXTreeUpdate GetEmptyDocument();
 
   // Get the closest containing HWND.
   HWND GetParentHWND();
 
   // The IAccessible for the parent window.
   IAccessible* GetParentIAccessible();
 
   // Calls NotifyWinEvent if the parent window's IAccessible pointer is known.
-  void MaybeCallNotifyWinEvent(DWORD event, BrowserAccessibility* node);
+  void MaybeCallNotifyWinEvent(DWORD event, LONG child_id);
 
   // AXTree methods
   virtual void OnNodeWillBeDeleted(ui::AXNode* node) override;
   virtual void OnNodeCreated(ui::AXNode* node) override;
 
   // BrowserAccessibilityManager methods
   virtual void OnWindowFocused() override;
   virtual void NotifyAccessibilityEvent(
       ui::AXEvent event_type, BrowserAccessibility* node) override;
 
@@ skipping 31 matching lines @@
   // Set to true if we need to fire a focus event on the root as soon as
   // possible.
   bool focus_event_on_root_needed_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManagerWin);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_