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

ash/system/ime_menu/ime_menu_tray_unittest.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 "ash/system/ime_menu/ime_menu_tray.h"
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accessibility_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/ime_menu/ime_list_view.h"
@@ skipping 52 matching lines @@
     }
     for (const auto& ime : ime_map) {
       // Tests that all the IMEs on the view is in the list of selected IMEs.
       if (std::find(expected_ime_ids.begin(), expected_ime_ids.end(),
                     ime.second) == expected_ime_ids.end()) {
         return false;
       }
 
       // Tests that the checked IME is the current IME.
       ui::AXNodeData node_data;
-      node_data.state = 0;
       ime.first->GetAccessibleNodeData(&node_data);
       const auto checked_state = static_cast<ui::AXCheckedState>(
           node_data.GetIntAttribute(ui::AX_ATTR_CHECKED_STATE));
       if (checked_state == ui::AX_CHECKED_STATE_TRUE) {
         if (ime.second != expected_current_ime.id)
           return false;
       }
     }
     return true;
   }
@@ skipping 230 matching lines @@
   input_method_manager = chromeos::input_method::InputMethodManager::Get();
   EXPECT_TRUE(input_method_manager &&
               input_method_manager->IsEmojiHandwritingVoiceOnImeMenuEnabled());
   EXPECT_TRUE(GetTray()->ShouldShowEmojiHandwritingVoiceButtons());
 
   FocusInInputContext(ui::TEXT_INPUT_TYPE_PASSWORD);
   EXPECT_FALSE(GetTray()->ShouldShowEmojiHandwritingVoiceButtons());
 }
 
 }  // namespace ash