Exposed the invalid state of form controls to the accessibility APIs.

ui/accessibility/ax_enums.idl

 // Copyright 2014 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.
 
 // These should be kept in sync with third_party/WebKit/public/web/WebAXEnums.h
 // until the Chromium and Blink trees are merged.
 [camel_case_enum_to_string=true] namespace ui {
 
   // For new entries to the following three enums, also add to
   // chrome/common/extensions/api/automation.idl.
@@ skipping 214 matching lines @@
     // Attributes that could apply to any node.
     access_key,
     action,
     auto_complete,
     container_live_relevant,
     container_live_status,
     description,
     display,
     help,
     html_tag,
+    // Only used when invalid_state == invalid_state_other.
+    aria_invalid_value,
     name,
     live_relevant,
     live_status,
     role,
     shortcut,
     text_input_type,
     url,
     value
   };
 
@@ skipping 41 matching lines @@
     color_value_green,
     color_value_blue,
 
     // Inline text attributes.
     text_direction,
 
     // Uniquely identifies an AXTree.
     tree_id,
 
     // Identifies a child tree which this node hosts.
-    child_tree_id
+    child_tree_id,
+
+    // Indicates if a form control has invalid input or
+    // if an element has an aria-invalid attribute.
+    invalid_state
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXFloatAttribute {
     // Document attributes.
     doc_loading_progress,
 
     // Range attributes.
     value_for_range,
     min_value_for_range,
     max_value_for_range
@@ skipping 70 matching lines @@
     word_starts,
     word_ends
   };
 
   [cpp_enum_prefix_override="ax"] enum AXTextDirection {
     text_direction_lr,
     text_direction_rl,
     text_direction_tb,
     text_direction_bt
   };
+
+  [cpp_enum_prefix_override="ax"] enum AXInvalidState {
+    invalid_state_false,
+    invalid_state_true,
+    invalid_state_spelling,
+    invalid_state_grammar,
+    invalid_state_other
+  };
+
 };