Fix behavior of HTMLInputElement.maxLength/minLength getter

components/autofill/content/renderer/form_autofill_util.cc

Index: components/autofill/content/renderer/form_autofill_util.cc
diff --git a/components/autofill/content/renderer/form_autofill_util.cc b/components/autofill/content/renderer/form_autofill_util.cc
index cb250901cebf9981ecdf844b0dbaade93acb50b4..a6816eae575a7fc794ed6c87d06cd422905eac49 100644
--- a/components/autofill/content/renderer/form_autofill_util.cc
+++ b/components/autofill/content/renderer/form_autofill_util.cc
@@ -878,9 +878,8 @@ void FillFormField(const FormFieldData& data,
   } else {
     base::string16 value = data.value;
     if (IsTextInput(input_element) || IsMonthInput(input_element)) {
-      // If the maxlength attribute contains a negative value, maxLength()
-      // returns the default maxlength value.
-      TruncateString(&value, input_element->maxLength());
+      if (input_element->maxLength() >= 0)
+        TruncateString(&value, input_element->maxLength());
     }
     field->setValue(value, true);
   }