Implement animation tainted custom property values

third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 282 matching lines @@
 void AbstractPropertySetCSSStyleDeclaration::setPropertyInternal(
     CSSPropertyID unresolvedProperty,
     const String& customPropertyName,
     const String& value,
     bool important,
     ExceptionState&) {
   StyleAttributeMutationScope mutationScope(this);
   willMutate();
 
   bool changed = false;
-  if (unresolvedProperty == CSSPropertyVariable)
+  if (unresolvedProperty == CSSPropertyVariable) {
+    bool isAnimationTainted = isKeyframeStyle();
     changed = propertySet().setProperty(AtomicString(customPropertyName), value,
-                                        important, contextStyleSheet());
-  else
+                                        important, contextStyleSheet(),
+                                        isAnimationTainted);
+  } else {
     changed = propertySet().setProperty(unresolvedProperty, value, important,
                                         contextStyleSheet());
+  }
 
   didMutate(changed ? PropertyChanged : NoChanges);
 
   if (!changed)
     return;
 
   Element* parent = parentElement();
   if (parent)
     parent->document().styleEngine().attributeChangedForElement(
         HTMLNames::styleAttr, *parent);
@@ skipping 73 matching lines @@
   return m_parentElement ? &m_parentElement->document().elementSheet()
                          : nullptr;
 }
 
 DEFINE_TRACE(InlineCSSStyleDeclaration) {
   visitor->trace(m_parentElement);
   AbstractPropertySetCSSStyleDeclaration::trace(visitor);
 }
 
 }  // namespace blink