Implemented the "aria-current" state on Windows.

ui/accessibility/ax_node_data.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/accessibility/ax_node_data.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 431 matching lines @@
       case AX_ATTR_PREVIOUS_ON_LINE_ID:
         result += " previous_on_line_id=" + value;
         break;
       case AX_ATTR_CHILD_TREE_ID:
         result += " child_tree_id=" + value;
         break;
       case AX_ATTR_COLOR_VALUE:
         result += base::StringPrintf(" color_value=&%X",
                                      int_attributes[i].second);
         break;
+      case AX_ATTR_ARIA_CURRENT_STATE:
+        switch (int_attributes[i].second) {
+          case AX_ARIA_CURRENT_STATE_FALSE:
+            result += " aria_current_state=false";
+            break;
+          case AX_ARIA_CURRENT_STATE_TRUE:
+            result += " aria_current_state=true";
+            break;
+          case AX_ARIA_CURRENT_STATE_PAGE:
+            result += " aria_current_state=page";
+            break;
+          case AX_ARIA_CURRENT_STATE_STEP:
+            result += " aria_current_state=step";
+            break;
+          case AX_ARIA_CURRENT_STATE_LOCATION:
+            result += " aria_current_state=location";
+            break;
+          case AX_ARIA_CURRENT_STATE_DATE:
+            result += " aria_current_state=date";
+            break;
+          case AX_ARIA_CURRENT_STATE_TIME:
+            result += " aria_current_state=time";
+            break;
+        }
+        break;
       case AX_ATTR_BACKGROUND_COLOR:
         result += base::StringPrintf(" background_color=&%X",
                                      int_attributes[i].second);
         break;
       case AX_ATTR_COLOR:
         result += base::StringPrintf(" color=&%X", int_attributes[i].second);
         break;
       case AX_ATTR_TEXT_DIRECTION:
         switch (int_attributes[i].second) {
           case AX_TEXT_DIRECTION_LTR:
@@ skipping 217 matching lines @@
     }
   }
 
   if (!child_ids.empty())
     result += " child_ids=" + IntVectorToString(child_ids);
 
   return result;
 }
 
 }  // namespace ui