Mac a11y: Add RoleDescription and Value attributes to accessibility information.

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),
       selection_start(-1),
       selection_end(-1),
       index(-1),
       count(-1),
       state_(0) { }
 
 AXViewState::~AXViewState() { }
 
+// static
+bool AXViewState::IsFlagSet(uint32_t state, ui::AXState state_flag) {
+  return 0 != (state & (1 << state_flag));
+}
+
 void AXViewState::AddStateFlag(ui::AXState state_flag) {
   state_ |= (1 << state_flag);
 }
 
 bool AXViewState::HasStateFlag(ui::AXState state_flag) const {
-  return 0 != (state_ & (1 << state_flag));
+  return IsFlagSet(state_, state_flag);
 }
 
 }  // namespace ui