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

components/pdf/renderer/pdf_accessibility_tree.cc

 // Copyright 2016 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 <algorithm>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversion_utils.h"
 #include "components/pdf/renderer/pdf_accessibility_tree.h"
@@ skipping 255 matching lines @@
 
 gfx::RectF PdfAccessibilityTree::ToRectF(const PP_Rect& r) {
   return gfx::RectF(r.point.x, r.point.y, r.size.width, r.size.height);
 }
 
 ui::AXNodeData* PdfAccessibilityTree::CreateNode(ui::AXRole role) {
   content::RenderAccessibility* render_accessibility = GetRenderAccessibility();
   DCHECK(render_accessibility);
 
   ui::AXNodeData* node = new ui::AXNodeData();
+  node->ClearBitfields();
   node->id = render_accessibility->GenerateAXID();
   node->role = role;
-  node->state = 1 << ui::AX_STATE_READ_ONLY;
+  node->AddState(ui::AX_STATE_READ_ONLY);
 
   // All nodes other than the first one have coordinates relative to
   // the first node.
   if (nodes_.size() > 0)
     node->offset_container_id = nodes_[0]->id;
 
   nodes_.push_back(base::WrapUnique(node));
 
   return node;
 }
@@ skipping 63 matching lines @@
 const ui::AXNode* PdfAccessibilityTree::GetNull() const {
   return nullptr;
 }
 
 void PdfAccessibilityTree::SerializeNode(
     const ui::AXNode* node, ui::AXNodeData* out_data) const {
   *out_data = node->data();
 }
 
 }  // namespace pdf