Merge 97351 - REGRESSION(r89915): <input type=email multiple> don't show the default value

Source/WebCore/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/)
  *
@@ skipping 1396 matching lines @@
     return m_inputType->convertFromVisibleValue(visibleValue);
 }
 
 bool HTMLInputElement::isAcceptableValue(const String& proposedValue) const
 {
     return m_inputType->isAcceptableValue(proposedValue);
 }
 
 String HTMLInputElement::sanitizeValue(const String& proposedValue) const
 {
+    if (proposedValue.isNull())
+        return proposedValue;
     return m_inputType->sanitizeValue(proposedValue);
 }
 
 bool HTMLInputElement::hasUnacceptableValue() const
 {
     return m_inputType->hasUnacceptableValue();
 }
 
 bool HTMLInputElement::isInRange() const
 {
@@ skipping 521 matching lines @@
     m_maxLength = maxLength;
     if (oldMaxLength != maxLength)
         updateValueIfNeeded();
     setNeedsStyleRecalc();
     setNeedsValidityCheck();
 }
 
 void HTMLInputElement::updateValueIfNeeded()
 {
     String newValue = sanitizeValue(m_valueIfDirty);
+    ASSERT(!m_valueIfDirty.isNull() || newValue.isNull());
     if (newValue != m_valueIfDirty)
         setValue(newValue);
 }
 
 } // namespace