CSP blocks style application in cloned nodes

Source/WebCore/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 354 matching lines @@
     PassRefPtr<Element> cloneElementWithoutChildren();
 
     void normalizeAttributes();
     String nodeNamePreservingCase() const;
 
     void setBooleanAttribute(const QualifiedName& name, bool);
 
     // For exposing to DOM only.
     NamedNodeMap* attributes() const;
 
+    enum AttributeModificationReason {
+        ModifiedDirectly,
+        ModifiedByCloning
+    };
+
     // This method is called whenever an attribute is added, changed or removed.
-    virtual void attributeChanged(const QualifiedName&, const AtomicString&);
+    virtual void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) { }
 
     // Only called by the parser immediately after element construction.
     void parserSetAttributes(const Vector<Attribute>&);
 
     // Remove attributes that might introduce scripting from the vector leaving the element unchanged.
     void stripScriptingAttributes(Vector<Attribute>&) const;
 
     const ElementData* elementData() const { return m_elementData.get(); }
     UniqueElementData* ensureUniqueElementData();
@@ skipping 283 matching lines @@
 
     void scrollByUnits(int units, ScrollGranularity);
 
     virtual void setPrefix(const AtomicString&, ExceptionCode&);
     virtual NodeType nodeType() const;
     virtual bool childTypeAllowed(NodeType) const;
 
     void setAttributeInternal(size_t index, const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
     void addAttributeInternal(const QualifiedName&, const AtomicString& value, SynchronizationOfLazyAttribute);
     void removeAttributeInternal(size_t index, SynchronizationOfLazyAttribute);
-    void attributeChangedFromParserOrByCloning(const QualifiedName&, const AtomicString&);
+    void attributeChangedFromParserOrByCloning(const QualifiedName&, const AtomicString&, AttributeModificationReason);
 
 #ifndef NDEBUG
     virtual void formatForDebugger(char* buffer, unsigned length) const;
 #endif
 
     bool pseudoStyleCacheIsInvalid(const RenderStyle* currentStyle, RenderStyle* newStyle);
 
     void cancelFocusAppearanceUpdate();
 
     virtual const AtomicString& virtualPrefix() const { return prefix(); }
@@ skipping 309 matching lines @@
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     if (m_isUnique)
         return &static_cast<const UniqueElementData*>(this)->m_attributeVector.at(index);
     return &static_cast<const ShareableElementData*>(this)->m_attributeArray[index];
 }
 
 } // namespace
 
 #endif