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

content/renderer/accessibility/blink_ax_enum_conversion.cc

 // Copyright (c) 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 "content/renderer/accessibility/blink_ax_enum_conversion.h"
 
 #include "base/logging.h"
 
 namespace content {
 
@@ skipping 382 matching lines @@
       return ui::AX_TEXT_DIRECTION_TB;
     case blink::WebAXTextDirectionBT:
       return ui::AX_TEXT_DIRECTION_BT;
     default:
       NOTREACHED();
   }
 
   return ui::AX_TEXT_DIRECTION_NONE;
 }
 
+ui::AXInvalidState AXInvalidStateFromBlink(
+    blink::WebAXInvalidState invalid_state) {
+  switch (invalid_state) {
+    case blink::WebAXInvalidStateUndefined:
+      return ui::AX_INVALID_STATE_NONE;
+    case blink::WebAXInvalidStateFalse:
+      return ui::AX_INVALID_STATE_FALSE;
+    case blink::WebAXInvalidStateTrue:
+      return ui::AX_INVALID_STATE_TRUE;
+    case blink::WebAXInvalidStateSpelling:
+      return ui::AX_INVALID_STATE_SPELLING;
+    case blink::WebAXInvalidStateGrammar:
+      return ui::AX_INVALID_STATE_GRAMMAR;
+    case blink::WebAXInvalidStateOther:
+      return ui::AX_INVALID_STATE_OTHER;
+    default:
+      NOTREACHED();
+  }
+
+  return ui::AX_INVALID_STATE_NONE;
+}
+
 }  // namespace content