Add 4 ARIA 1.1 attributes using new sparse attribute interface.

third_party/WebKit/Source/modules/accessibility/AXObject.h

Index: third_party/WebKit/Source/modules/accessibility/AXObject.h
diff --git a/third_party/WebKit/Source/modules/accessibility/AXObject.h b/third_party/WebKit/Source/modules/accessibility/AXObject.h
index 1961634ace6d3c0351dbb88a23804c8d88e5bd40..911958bb10a155fea538df11b84616fed856e33e 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObject.h
+++ b/third_party/WebKit/Source/modules/accessibility/AXObject.h
@@ -328,14 +328,19 @@ enum TextUnderElementMode {
 
 enum class AXBoolAttribute {};
 
-enum class AXStringAttribute {};
+enum class AXStringAttribute {
+  AriaKeyShortcuts,
+  AriaRoleDescription,
+};
 
 enum class AXObjectAttribute {
   AriaActiveDescendant,
+  AriaErrorMessage,
 };
 
 enum class AXObjectVectorAttribute {
   AriaControls,
+  AriaDetails,
   AriaFlowTo,
 };