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

ui/accessibility/ax_view_state.h

Index: ui/accessibility/ax_view_state.h
diff --git a/ui/accessibility/ax_view_state.h b/ui/accessibility/ax_view_state.h
index 6126edbac97559b0adf99c5d8f7853a626bea152..bc5af258ddcf3dd24833d2bd2a0ea810efa41100 100644
--- a/ui/accessibility/ax_view_state.h
+++ b/ui/accessibility/ax_view_state.h
@@ -27,9 +27,12 @@ struct AX_EXPORT AXViewState {
   AXViewState();
   ~AXViewState();
 
+  // Helper to check whether |state_flag| is set in the given |state|.
+  static bool IsFlagSet(uint32_t state, ui::AXState state_flag);
+
   // Set or check bits in |state_|.
-  void AddStateFlag(ui::AXState state);
-  bool HasStateFlag(ui::AXState state) const;
+  void AddStateFlag(ui::AXState state_flag);
+  bool HasStateFlag(ui::AXState state_flag) const;
 
   // The view's state, a bitmask containing fields such as checked
   // (for a checkbox) and protected (for a password text box). This "state"