Wire up an api to darken screen for accessibility

ui/accessibility/ax_action_data.cc

Index: ui/accessibility/ax_action_data.cc
diff --git a/ui/accessibility/ax_action_data.cc b/ui/accessibility/ax_action_data.cc
index 8b9dbbef3c6934b03b7e369d72d6eda5433f4713..50813a9d06e5bdb028060ec3507217a3eab5694f 100644
--- a/ui/accessibility/ax_action_data.cc
+++ b/ui/accessibility/ax_action_data.cc
@@ -4,6 +4,7 @@
 
 #include "ui/accessibility/ax_action_data.h"
 
+#include <algorithm>
 #include <set>
 
 #include "base/strings/string_number_conversions.h"
@@ -30,6 +31,20 @@ AXActionData::AXActionData(const AXActionData& other) = default;
 AXActionData::~AXActionData() {
 }
 
+void AXActionData::AddBoolAttribute(AXActionBoolAttribute attribute,
+                                    bool value) {
+  bool_attributes.push_back(std::make_pair(attribute, value));
+}
+
+bool AXActionData::GetBoolAttribute(AXActionBoolAttribute attr) const {
+  auto iter =
+      std::find_if(bool_attributes.begin(), bool_attributes.end(),
+                   [attr](const std::pair<AXActionBoolAttribute, bool>& item) {
+                     return item.first == attr;
+                   });
+  return iter != bool_attributes.end() && iter->second;
+}
+
 // Note that this includes an initial space character if nonempty, but
 // that works fine because this is normally printed by AXAction::ToString.
 std::string AXActionData::ToString() const {