Filter out datalist values for textarea field from renderer side.

components/autofill/content/renderer/autofill_agent.cc

Index: components/autofill/content/renderer/autofill_agent.cc
diff --git a/components/autofill/content/renderer/autofill_agent.cc b/components/autofill/content/renderer/autofill_agent.cc
index e8a9e02daa51647b7110d2e203c5db4224810959..b14863bc1c37e1b87544b63962de265a6227fb7b 100644
--- a/components/autofill/content/renderer/autofill_agent.cc
+++ b/components/autofill/content/renderer/autofill_agent.cc
@@ -348,7 +348,8 @@ void AutofillAgent::textFieldDidChange(const WebFormControlElement& element) {
   if (ignore_text_changes_)
     return;
 
-  DCHECK(toWebInputElement(&element) || IsTextAreaElement(element));
+  if (!toWebInputElement(&element) && !IsTextAreaElement(element))
+    return;

[Ilya Sherman, 2014/04/22 21:08:45]

Why is this code reachable?

 
   if (did_set_node_text_) {
     did_set_node_text_ = false;
@@ -419,7 +420,9 @@ void AutofillAgent::openTextDataListChooser(const WebInputElement& element) {
 void AutofillAgent::AcceptDataListSuggestion(
     const base::string16& suggested_value) {
   WebInputElement* input_element = toWebInputElement(&element_);
-  DCHECK(input_element);
+  if (!input_element)
+    return;

[Ilya Sherman, 2014/04/22 21:08:45]

Why is this code reachable?

+
   base::string16 new_value = suggested_value;
   // If this element takes multiple values then replace the last part with
   // the suggestion.