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..a262352c4b792227f4ba779923e8e85e116bd6d0 100644
--- a/ui/accessibility/ax_view_state.cc
+++ b/ui/accessibility/ax_view_state.cc
@@ -16,4 +16,12 @@ AXViewState::AXViewState()
 
 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