Fix incorrect use of AXState caused when refactoring two enums into one.

ui/accessibility/ax_view_state.cc

 // Copyright (c) 2011 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/accessibility/ax_view_state.h"
 
 namespace ui {
 
 AXViewState::AXViewState()
     : role(AX_ROLE_CLIENT),
       state(0),
       selection_start(-1),
       selection_end(-1),
       index(-1),
       count(-1) { }
 
 AXViewState::~AXViewState() { }
 
+void AXViewState::SetStateFlag(ui::AXState state_flag) {
+  state |= (1 << state_flag);
+}
+
+bool AXViewState::HasStateFlag(ui::AXState state_flag) const {
+  return 0 != (state & (1 << state_flag));
+}
+
 }  // namespace ui