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

content/browser/accessibility/browser_accessibility_manager_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.
 
 #include "content/browser/accessibility/browser_accessibility_manager_mac.h"
 
 #include "base/bind.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 117 matching lines @@
 }
 
 BrowserAccessibilityManagerMac::~BrowserAccessibilityManagerMac() {}
 
 // static
 ui::AXTreeUpdate
     BrowserAccessibilityManagerMac::GetEmptyDocument() {
   ui::AXNodeData empty_document;
   empty_document.id = 0;
   empty_document.role = ui::AX_ROLE_ROOT_WEB_AREA;
-  empty_document.state =
-      1 << ui::AX_STATE_READ_ONLY;
+  empty_document.AddState(ui::AX_STATE_READ_ONLY);
   ui::AXTreeUpdate update;
   update.root_id = empty_document.id;
   update.nodes.push_back(empty_document);
   return update;
 }
 
 BrowserAccessibility* BrowserAccessibilityManagerMac::GetFocus() {
   BrowserAccessibility* focus = BrowserAccessibilityManager::GetFocus();
 
   // On Mac, list boxes should always get focus on the whole list, otherwise
@@ skipping 214 matching lines @@
 
   // Starting from OS X 10.11, if the user has edited some text we need to
   // dispatch the actual text that changed on the value changed notification.
   // We run this code on all OS X versions to get the highest test coverage.
   base::string16 old_text, new_text;
   ui::AXRole role = new_node_data.role;
   if (role == ui::AX_ROLE_COMBO_BOX || role == ui::AX_ROLE_SEARCH_BOX ||
       role == ui::AX_ROLE_TEXT_FIELD) {
     old_text = old_node_data.GetString16Attribute(ui::AX_ATTR_VALUE);
     new_text = new_node_data.GetString16Attribute(ui::AX_ATTR_VALUE);
-  } else if (new_node_data.state & (1 << ui::AX_STATE_EDITABLE)) {
+  } else if (new_node_data.HasState(ui::AX_STATE_EDITABLE)) {
     old_text = old_node_data.GetString16Attribute(ui::AX_ATTR_NAME);
     new_text = new_node_data.GetString16Attribute(ui::AX_ATTR_NAME);
   }
 
   if ((old_text.empty() && new_text.empty()) ||
       old_text.length() == new_text.length()) {
     return;
   }
 
   if (old_text.length() < new_text.length()) {
@@ skipping 94 matching lines @@
     NSAccessibilityTextChangeValues : changes,
     NSAccessibilityTextChangeElement : native_node
   };
 }
 
 NSView* BrowserAccessibilityManagerMac::GetParentView() {
   return delegate() ? delegate()->AccessibilityGetAcceleratedWidget() : nullptr;
 }
 
 }  // namespace content