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

ui/views/accessibility/native_view_accessibility_base.cc

 // Copyright (c) 2013 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 "ui/views/accessibility/native_view_accessibility_base.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 22 matching lines @@
 
 void NativeViewAccessibilityBase::NotifyAccessibilityEvent(
     ui::AXEvent event_type) {
   ax_node_->NotifyAccessibilityEvent(event_type);
 }
 
 // ui::AXPlatformNodeDelegate
 
 const ui::AXNodeData& NativeViewAccessibilityBase::GetData() const {
   data_ = ui::AXNodeData();
-  data_.state = 0;
+  data_.ClearBitfields();
 
   // Views may misbehave if their widget is closed; return an unknown role
   // rather than possibly crashing.
   if (!view_->GetWidget() || view_->GetWidget()->IsClosed()) {
     data_.role = ui::AX_ROLE_UNKNOWN;
-    data_.state = 1 << ui::AX_STATE_DISABLED;
+    data_.AddState(ui::AX_STATE_DISABLED);
     return data_;
   }
 
   view_->GetAccessibleNodeData(&data_);
   data_.location = GetBoundsInScreen();
   base::string16 description;
   view_->GetTooltipText(gfx::Point(), &description);
   data_.AddStringAttribute(ui::AX_ATTR_DESCRIPTION,
                            base::UTF16ToUTF8(description));
 
   if (view_->IsAccessibilityFocusable())
-    data_.state |= (1 << ui::AX_STATE_FOCUSABLE);
+    data_.AddState(ui::AX_STATE_FOCUSABLE);
 
   if (!view_->enabled())
-    data_.state |= (1 << ui::AX_STATE_DISABLED);
+    data_.AddState(ui::AX_STATE_DISABLED);
 
   if (!view_->IsDrawn())
-    data_.state |= (1 << ui::AX_STATE_INVISIBLE);
+    data_.AddState(ui::AX_STATE_INVISIBLE);
 
   return data_;
 }
 
 int NativeViewAccessibilityBase::GetChildCount() {
   int child_count = view_->child_count();
 
   std::vector<Widget*> child_widgets;
   PopulateChildWidgetVector(&child_widgets);
   child_count += child_widgets.size();
@@ skipping 142 matching lines @@
               child_widget_platform_node->GetDelegate());
       if (child_widget_view_accessibility->parent_widget() != widget)
         child_widget_view_accessibility->SetParentWidget(widget);
     }
 
     result_child_widgets->push_back(child_widget);
   }
 }
 
 }  // namespace views