Explicitly set checkbox state should not be influenced by defaultState

third_party/WebKit/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 881 matching lines @@
 }
 
 bool HTMLInputElement::checked() const
 {
     m_inputType->readingChecked();
     return m_isChecked;
 }
 
 void HTMLInputElement::setChecked(bool nowChecked, TextFieldEventBehavior eventBehavior)
 {
+    m_reflectsCheckedAttribute = false;
     if (checked() == nowChecked)
         return;
 
-    m_reflectsCheckedAttribute = false;
     m_isChecked = nowChecked;
 
     if (RadioButtonGroupScope* scope = radioButtonGroupScope())
         scope->updateCheckedState(this);
     if (layoutObject())
         LayoutTheme::theme().controlStateChanged(*layoutObject(), CheckedControlState);
 
     setNeedsValidityCheck();
 
     // Ideally we'd do this from the layout tree (matching
@@ skipping 1001 matching lines @@
 void HTMLInputElement::ensurePrimaryContent()
 {
     m_inputTypeView->ensurePrimaryContent();
 }
 
 bool HTMLInputElement::hasFallbackContent() const
 {
     return m_inputTypeView->hasFallbackContent();
 }
 } // namespace blink