Update autocomplete dropdown when datalist changes.

components/autofill/content/renderer/autofill_agent.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 "components/autofill/content/renderer/autofill_agent.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_split.h"
@@ skipping 431 matching lines @@
   }
 }
 
 void AutofillAgent::openTextDataListChooser(const WebInputElement& element) {
   ShowSuggestionsOptions options;
   options.autofill_on_empty_values = true;
   options.datalist_only = true;
   ShowSuggestions(element, options);
 }
 
+void AutofillAgent::dataListOptionsChanged(const WebInputElement& element) {
+  if (!is_popup_possibly_visible_ || !element.focused())
+    return;
+
+  TextFieldDidChangeImpl(element);
+}
+
 void AutofillAgent::firstUserGestureObserved() {
   password_autofill_agent_->FirstUserGestureObserved();
   Send(new AutofillHostMsg_FirstUserGestureObserved(routing_id()));
 }
 
 void AutofillAgent::AcceptDataListSuggestion(
     const base::string16& suggested_value) {
   WebInputElement* input_element = toWebInputElement(&element_);
   DCHECK(input_element);
   base::string16 new_value = suggested_value;
@@ skipping 370 matching lines @@
 void AutofillAgent::LegacyAutofillAgent::Resized() {
   agent_->Resized();
 }
 
 void AutofillAgent::LegacyAutofillAgent::FrameWillClose(
     blink::WebFrame* frame) {
   agent_->LegacyFrameWillClose(frame);
 }
 
 }  // namespace autofill