A11y: Add/refactor methods for manipulating bitfields on AXNodeData.

content/browser/accessibility/browser_accessibility_manager_win.cc

 // 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.
 
 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 39 matching lines @@
   // destructor, otherwise our overrides of functions like
   // OnNodeWillBeDeleted won't be called.
   tree_.reset(NULL);
   ui::GetIAccessible2UsageObserverList().RemoveObserver(this);
 }
 
 // static
 ui::AXTreeUpdate
     BrowserAccessibilityManagerWin::GetEmptyDocument() {
   ui::AXNodeData empty_document;
+  empty_document.ClearBitfields();
   empty_document.id = 0;
   empty_document.role = ui::AX_ROLE_ROOT_WEB_AREA;
-  empty_document.state =
-      (1 << ui::AX_STATE_READ_ONLY) | (1 << ui::AX_STATE_BUSY);
+  empty_document.AddState(ui::AX_STATE_READ_ONLY);
+  empty_document.AddState(ui::AX_STATE_BUSY);
 
   ui::AXTreeUpdate update;
   update.root_id = empty_document.id;
   update.nodes.push_back(empty_document);
   return update;
 }
 
 HWND BrowserAccessibilityManagerWin::GetParentHWND() {
   BrowserAccessibilityDelegate* delegate = GetDelegateFromRootManager();
   if (!delegate)
@@ skipping 225 matching lines @@
     DCHECK(changed_node);
     BrowserAccessibility* obj = GetFromAXNode(changed_node);
     if (obj && obj->IsNative() && !obj->PlatformIsChildOfLeaf()) {
       ToBrowserAccessibilityWin(obj)->UpdateStep3FireEvents(
           changes[i].type == AXTreeDelegate::SUBTREE_CREATED);
     }
   }
 }
 
 }  // namespace content