Fix behavior of HTMLInputElement.maxLength/minLength getter

third_party/WebKit/public/web/WebInputElement.h

 /*
  * 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 43 matching lines @@
     // This returns true for all of textfield-looking types such as text,
     // password, search, email, url, and number.
     BLINK_EXPORT bool isTextField() const;
     // This returns true only for type=text.
     BLINK_EXPORT bool isText() const;
     BLINK_EXPORT bool isEmailField() const;
     BLINK_EXPORT bool isPasswordField() const;
     BLINK_EXPORT bool isImageButton() const;
     BLINK_EXPORT bool isRadioButton() const;
     BLINK_EXPORT bool isCheckbox() const;
+    // This has different behavior from 'maxLength' IDL attribute, it returns
+    // HTMLInputElement::maximumLength when no valid has been set,
+    // whereas 'maxLength' IDL attribute returns -1.
     BLINK_EXPORT int maxLength() const;
     BLINK_EXPORT void setActivatedSubmit(bool);
     BLINK_EXPORT int size() const;
     BLINK_EXPORT void setChecked(bool, bool sendEvents = false);
     // Sets the value inside the text field without being sanitized. Can't be
     // used if a renderer doesn't exist or on a non text field type. Caret will
     // be moved to the end.
     BLINK_EXPORT void setEditingValue(const WebString&);
     BLINK_EXPORT bool isValidValue(const WebString&) const;
     BLINK_EXPORT bool isChecked() const;
@@ skipping 23 matching lines @@
 BLINK_EXPORT WebInputElement* toWebInputElement(WebElement*);
 // This returns 0 if the specified WebElement is not a WebInputElement.
 inline const WebInputElement* toWebInputElement(const WebElement* element)
 {
     return toWebInputElement(const_cast<WebElement*>(element));
 }
 
 } // namespace blink
 
 #endif