Remove input.type = ""; quirk.

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 377 matching lines @@
 }
 
 void HTMLInputElement::handleBlurEvent()
 {
     m_inputType->disableSecureTextInput();
     m_inputTypeView->handleBlurEvent();
 }
 
 void HTMLInputElement::setType(const AtomicString& type)
 {
-    // FIXME: This should just call setAttribute. No reason to handle the empty string specially.
-    // We should write a test case to show that setting to the empty string does not remove the
-    // attribute in other browsers and then fix this. Note that setting to null *does* remove
-    // the attribute and setAttribute implements that.
-    if (type.isEmpty())
-        removeAttribute(typeAttr);
-    else
-        setAttribute(typeAttr, type);
+    setAttribute(typeAttr, type);
 }
 
 void HTMLInputElement::updateType()
 {
     const AtomicString& newTypeName = InputType::normalizeTypeName(fastGetAttribute(typeAttr));
     bool hadType = m_hasType;
     m_hasType = true;
     if (m_inputType->formControlType() == newTypeName)
         return;
 
@@ skipping 1456 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputTypeView->customStyleForRenderer(originalStyleForRenderer());
 }
 #endif
 
 } // namespace