Set element value to its default value on reset

Source/core/html/HTMLInputElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 1007 matching lines @@
     String sanitizedValue = sanitizeValue(value);
     bool valueChanged = sanitizedValue != this->value();
 
     setLastChangeWasNotUserEdit();
     m_needsToUpdateViewValue = true;
     m_suggestedValue = String(); // Prevent TextFieldInputType::setValue from using the suggested value.
 
     m_inputType->setValue(sanitizedValue, valueChanged, eventBehavior);
 
     if (valueChanged && eventBehavior == DispatchNoEvent)
-        setTextAsOfLastFormControlChangeEvent(sanitizedValue);
+        setTextAsOfLastFormControlChangeEvent(sanitizedValue.isNull() ? defaultValue() : sanitizedValue);
 
     if (!valueChanged)
         return;
 
     notifyFormStateChanged();
 }
 
 void HTMLInputElement::setValueInternal(const String& sanitizedValue, TextFieldEventBehavior eventBehavior)
 {
     m_valueIfDirty = sanitizedValue;
@@ skipping 818 matching lines @@
 void HTMLInputElement::ensurePrimaryContent()
 {
     m_inputTypeView->ensurePrimaryContent();
 }
 
 bool HTMLInputElement::hasFallbackContent() const
 {
     return m_inputTypeView->hasFallbackContent();
 }
 } // namespace