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

content/browser/accessibility/browser_accessibility_auralinux.cc

 // Copyright (c) 2015 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.
 
 #include "content/browser/accessibility/browser_accessibility_auralinux.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_manager_auralinux.h"
 #include "content/common/accessibility_messages.h"
 
@@ skipping 706 matching lines @@
 
 void browser_accessibility_detach(BrowserAccessibilityAtk* atk_object) {
   atk_object->m_object = NULL;
 }
 
 // static
 BrowserAccessibility* BrowserAccessibility::Create() {
   return new BrowserAccessibilityAuraLinux();
 }
 
-const BrowserAccessibilityAuraLinux*
-BrowserAccessibility::ToBrowserAccessibilityAuraLinux() const {
-  return static_cast<const BrowserAccessibilityAuraLinux*>(this);
-}
-
 BrowserAccessibilityAuraLinux*
 BrowserAccessibility::ToBrowserAccessibilityAuraLinux() {
   return static_cast<BrowserAccessibilityAuraLinux*>(this);
 }
 
 BrowserAccessibilityAuraLinux::BrowserAccessibilityAuraLinux()
     : atk_object_(NULL) {
 }
 
 BrowserAccessibilityAuraLinux::~BrowserAccessibilityAuraLinux() {
@@ skipping 180 matching lines @@
     case ui::AX_ROLE_TREE_ITEM:
       atk_role_ = ATK_ROLE_TREE_ITEM;
       break;
     default:
       atk_role_ = ATK_ROLE_UNKNOWN;
       break;
   }
 }
 
 }  // namespace content