Revert of Fixes for contenteditable caret and selection handling in Windows.

content/browser/accessibility/browser_accessibility_mac.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "content/browser/accessibility/browser_accessibility_mac.h"
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 #include "content/browser/accessibility/browser_accessibility_manager_mac.h"
@@ skipping 45 matching lines @@
   // end up recreating the whole subtree.
   base::scoped_nsobject<NSMutableArray> children;
   [browser_accessibility_cocoa_ swapChildren:&children];
   [browser_accessibility_cocoa_ detach];
   [browser_accessibility_cocoa_ release];
   browser_accessibility_cocoa_ = [[BrowserAccessibilityCocoa alloc]
       initWithObject:this];
   [browser_accessibility_cocoa_ swapChildren:&children];
 }
 
-const BrowserAccessibilityCocoa*
-BrowserAccessibility::ToBrowserAccessibilityCocoa() const {
-  return static_cast<const BrowserAccessibilityMac*>(this)->native_view();
-}
-
 BrowserAccessibilityCocoa* BrowserAccessibility::ToBrowserAccessibilityCocoa() {
   return static_cast<BrowserAccessibilityMac*>(this)->
       native_view();
 }
 
 }  // namespace content