Remove some dead code from rendering/ folder

Source/core/rendering/style/KeyframeList.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 10 matching lines @@
 
 #include "config.h"
 #include "core/rendering/style/KeyframeList.h"
 
 #include "core/animation/Animation.h"
 #include "core/css/StylePropertySet.h"
 #include "core/rendering/RenderObject.h"
 
 namespace WebCore {
 
-void KeyframeValue::addProperties(const StylePropertySet* propertySet)
-{
-    if (!propertySet)
-        return;
-    unsigned propertyCount = propertySet->propertyCount();
-    for (unsigned i = 0; i < propertyCount; ++i) {
-        CSSPropertyID property = propertySet->propertyAt(i).id();
-        // Timing-function within keyframes is special, because it is not animated; it just
-        // describes the timing function between this keyframe and the next.
-        if (property != CSSPropertyWebkitAnimationTimingFunction && property != CSSPropertyAnimationTimingFunction)
-            addProperty(property);
-    }
-}
-
 TimingFunction* KeyframeValue::timingFunction(const RenderStyle& keyframeStyle)
 {
     const CSSAnimationDataList* animations = keyframeStyle.animations();
     ASSERT(animations && !animations->isEmpty());
     return animations->animation(0)->timingFunction();
 }
 
 KeyframeList::~KeyframeList()
 {
     clear();
@@ skipping 38 matching lines @@
             for (HashSet<CSSPropertyID>::const_iterator it = currKeyframe.properties().begin(); it != currKeyframe.properties().end(); ++it)
                 m_properties.add(*it);
         }
     } else {
         for (HashSet<CSSPropertyID>::const_iterator it = keyframe.properties().begin(); it != keyframe.properties().end(); ++it)
             m_properties.add(*it);
     }
 }
 
 } // namespace WebCore