ARIA state/property aria-autocomplete should expose IA2_STATE_SUPPORTS_AUTOCOMPLETION.

content/renderer/accessibility/blink_ax_tree_source.cc

 // 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.
 
 #include "content/renderer/accessibility/blink_ax_tree_source.h"
 
 #include <set>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 249 matching lines @@
     dst->AddIntListAttribute(ui::AX_ATTR_WORD_STARTS, word_starts);
     dst->AddIntListAttribute(ui::AX_ATTR_WORD_ENDS, word_ends);
   }
 
   if (src.accessKey().length()) {
     dst->AddStringAttribute(ui::AX_ATTR_ACCESS_KEY,
     UTF16ToUTF8(src.accessKey()));
   }
   if (src.actionVerb().length())
     dst->AddStringAttribute(ui::AX_ATTR_ACTION, UTF16ToUTF8(src.actionVerb()));
+  if (src.ariaAutoComplete().length())
+    dst->AddStringAttribute(ui::AX_ATTR_AUTO_COMPLETE,
+                            UTF16ToUTF8(src.ariaAutoComplete()));
   if (src.isAriaReadOnly())
     dst->AddBoolAttribute(ui::AX_ATTR_ARIA_READONLY, true);
   if (src.isButtonStateMixed())
     dst->AddBoolAttribute(ui::AX_ATTR_BUTTON_MIXED, true);
   if (src.canSetValueAttribute())
     dst->AddBoolAttribute(ui::AX_ATTR_CAN_SET_VALUE, true);
   if (src.accessibilityDescription().length()) {
     dst->AddStringAttribute(ui::AX_ATTR_DESCRIPTION,
                             UTF16ToUTF8(src.accessibilityDescription()));
   }
@@ skipping 282 matching lines @@
     AddIntListAttributeFromWebObjects(ui::AX_ATTR_OWNS_IDS, owns, dst);
 }
 
 blink::WebDocument BlinkAXTreeSource::GetMainDocument() const {
   if (render_frame_ && render_frame_->GetWebFrame())
     return render_frame_->GetWebFrame()->document();
   return WebDocument();
 }
 
 }  // namespace content