Fix behavior of HTMLInputElement.maxLength/minLength getter

third_party/WebKit/Source/web/WebInputElement.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 65 matching lines @@
     return constUnwrap<HTMLInputElement>()->type() == InputTypeNames::radio;
 }
 
 bool WebInputElement::isCheckbox() const
 {
     return constUnwrap<HTMLInputElement>()->type() == InputTypeNames::checkbox;
 }
 
 int WebInputElement::maxLength() const
 {
-    return constUnwrap<HTMLInputElement>()->maxLength();
+    int maxLen = constUnwrap<HTMLInputElement>()->maxLength();
+    return maxLen == -1 ? HTMLInputElement::maximumLength : maxLen;
 }
 
 void WebInputElement::setActivatedSubmit(bool activated)
 {
     unwrap<HTMLInputElement>()->setActivatedSubmit(activated);
 }
 
 int WebInputElement::size() const
 {
     return constUnwrap<HTMLInputElement>()->size();
@@ skipping 65 matching lines @@
 }
 
 WebInputElement* toWebInputElement(WebElement* webElement)
 {
     if (!isHTMLInputElement(*webElement->unwrap<Element>()))
         return 0;
 
     return static_cast<WebInputElement*>(webElement);
 }
 } // namespace blink