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

ui/accessibility/ax_view_state.cc

Index: ui/accessibility/ax_view_state.cc
diff --git a/ui/accessibility/ax_view_state.cc b/ui/accessibility/ax_view_state.cc
index fb19e2d38d8cd9fb0b1fddfcd53341b31dfb9250..11044bc16dd05304e96441b33641153621637a0a 100644
--- a/ui/accessibility/ax_view_state.cc
+++ b/ui/accessibility/ax_view_state.cc
@@ -8,12 +8,20 @@ namespace ui {
 
 AXViewState::AXViewState()
     : role(AX_ROLE_CLIENT),
-      state(0),
       selection_start(-1),
       selection_end(-1),
       index(-1),
-      count(-1) { }
+      count(-1),
+      state_(0) { }
 
 AXViewState::~AXViewState() { }
 
+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));
+}
+
 }  // namespace ui