Click event should be fired before change events for checkbox and radio button.

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 879 matching lines @@
 
     setChecked(hasAttribute(checkedAttr));
     m_reflectsCheckedAttribute = true;
 }
 
 bool HTMLInputElement::isTextField() const
 {
     return m_inputType->isTextField();
 }
 
+void HTMLInputElement::dispatchChangeEventIfNeeded()
+{
+    setTextAsOfLastFormControlChangeEvent(String());
+    if (inDocument() && m_inputType->shouldSendChangeEventAfterCheckedChanged())
+        dispatchFormControlChangeEvent();
+}
+
 void HTMLInputElement::setChecked(bool nowChecked, TextFieldEventBehavior eventBehavior)
 {
     if (checked() == nowChecked)
         return;
 
     RefPtrWillBeRawPtr<HTMLInputElement> protector(this);
     m_reflectsCheckedAttribute = false;
     m_isChecked = nowChecked;
 
     if (RadioButtonGroupScope* scope = radioButtonGroupScope())
@@ skipping 13 matching lines @@
 
     // Only send a change event for items in the document (avoid firing during
     // parsing) and don't send a change event for a radio button that's getting
     // unchecked to match other browsers. DOM is not a useful standard for this
     // because it says only to fire change events at "lose focus" time, which is
     // definitely wrong in practice for these types of elements.
     if (eventBehavior != DispatchNoEvent && inDocument() && m_inputType->shouldSendChangeEventAfterCheckedChanged()) {
         setTextAsOfLastFormControlChangeEvent(String());
         if (eventBehavior == DispatchInputAndChangeEvent)
             dispatchFormControlInputEvent();
-        dispatchFormControlChangeEvent();
     }
 
     pseudoStateChanged(CSSSelector::PseudoChecked);
 }
 
 void HTMLInputElement::setIndeterminate(bool newValue)
 {
     if (indeterminate() == newValue)
         return;
 
@@ skipping 965 matching lines @@
 void HTMLInputElement::ensurePrimaryContent()
 {
     m_inputTypeView->ensurePrimaryContent();
 }
 
 bool HTMLInputElement::hasFallbackContent() const
 {
     return m_inputTypeView->hasFallbackContent();
 }
 } // namespace