[Autofill] Update the autocomplete types implementation to match the current HTML spec.

chrome/renderer/autofill/form_autofill_util.cc

Index: chrome/renderer/autofill/form_autofill_util.cc
diff --git a/chrome/renderer/autofill/form_autofill_util.cc b/chrome/renderer/autofill/form_autofill_util.cc
index 42d6ffa5b521a393d0f92fd8303cb1236552ea29..486e30d3663bd08e39f299da07be9c4084de906e 100644
--- a/chrome/renderer/autofill/form_autofill_util.cc
+++ b/chrome/renderer/autofill/form_autofill_util.cc
@@ -594,13 +594,12 @@ void WebFormControlElementToFormField(const WebFormControlElement& element,
   // WebFormElementToFormData.
   field->name = element.nameForAutofill();
   field->form_control_type = element.formControlType();
-  field->autocomplete_type = element.getAttribute("x-autocompletetype");
-  TrimWhitespace(field->autocomplete_type, TRIM_ALL, &field->autocomplete_type);
-  if (field->autocomplete_type.size() > kMaxDataLength) {
+  field->autocomplete_attribute = element.getAttribute("autocomplete");
+  if (field->autocomplete_attribute.size() > kMaxDataLength) {
     // Discard overly long attribute values to avoid DOS-ing the browser
     // process.  However, send over a default string to indicate that the
     // attribute was present.
-    field->autocomplete_type = ASCIIToUTF16("x-max-data-length-exceeded");
+    field->autocomplete_attribute = ASCIIToUTF16("x-max-data-length-exceeded");
   }
 
   if (!IsAutofillableElement(element))