Implemented the "aria-current" state on Windows.

third_party/WebKit/public/web/WebAXEnums.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 238 matching lines @@
 };
 
 // These values must match blink::AccessibilityOrientation values.
 // Enforced in AssertMatchingEnums.cpp.
 enum WebAXOrientation {
     WebAXOrientationUndefined = 0,
     WebAXOrientationVertical,
     WebAXOrientationHorizontal,
 };
 
+enum WebAXAriaCurrentState {
+    WebAXAriaCurrentStateUndefined = 0,
+    WebAXAriaCurrentStateFalse,
+    WebAXAriaCurrentStateTrue,
+    WebAXAriaCurrentStatePage,
+    WebAXAriaCurrentStateStep,
+    WebAXAriaCurrentStateLocation,
+    WebAXAriaCurrentStateDate,
+    WebAXAriaCurrentStateTime
+};
+
 // Only used by HTML form controls and any other element that has
 // an aria-invalid attribute specified.
 enum WebAXInvalidState {
     WebAXInvalidStateUndefined = 0,
     WebAXInvalidStateFalse,
     WebAXInvalidStateTrue,
     WebAXInvalidStateSpelling,
     WebAXInvalidStateGrammar,
     WebAXInvalidStateOther
 };
@@ skipping 28 matching lines @@
     WebAXDescriptionFromUninitialized = -1,
     WebAXDescriptionFromAttribute = 0,
     WebAXDescriptionFromContents,
     WebAXDescriptionFromPlaceholder,
     WebAXDescriptionFromRelatedElement,
 };
 
 } // namespace blink
 
 #endif