Filter out datalist values for textarea field from renderer side.

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 330 matching lines @@
 void AutofillAgent::textFieldDidEndEditing(const WebInputElement& element) {
   password_autofill_agent_->TextFieldDidEndEditing(element);
   has_shown_autofill_popup_for_current_edit_ = false;
   Send(new AutofillHostMsg_DidEndTextFieldEditing(routing_id()));
 }
 
 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;
     return;
   }
 
   // We post a task for doing the Autofill as the caret position is not set
   // properly at this point (http://bugs.webkit.org/show_bug.cgi?id=16976) and
   // it is needed to trigger autofill.
   weak_ptr_factory_.InvalidateWeakPtrs();
@@ skipping 50 matching lines @@
     ShowSuggestions(element, true, true, true, false);
 }
 
 void AutofillAgent::openTextDataListChooser(const WebInputElement& element) {
     ShowSuggestions(element, true, false, false, true);
 }
 
 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.
   if (input_element->isMultiple() &&
       input_element->formControlType() == WebString::fromUTF8("email")) {
     std::vector<base::string16> parts;
 
     base::SplitStringDontTrim(input_element->editingValue(), ',', &parts);
     if (parts.size() == 0)
       parts.push_back(base::string16());
@@ skipping 264 matching lines @@
     // Only monitors dynamic forms created in the top frame. Dynamic forms
     // inserted in iframes are not captured yet.
     if (frame && !frame->parent()) {
       password_autofill_agent_->OnDynamicFormsSeen(frame);
       return;
     }
   }
 }
 
 }  // namespace autofill