Remove the CSSOM.

sky/engine/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 24 matching lines @@
 #include "gen/sky/platform/RuntimeEnabledFeatures.h"
 #include "sky/engine/core/animation/ActiveAnimations.h"
 #include "sky/engine/core/animation/Animation.h"
 #include "sky/engine/core/animation/AnimationTimeline.h"
 #include "sky/engine/core/animation/StyleInterpolation.h"
 #include "sky/engine/core/animation/animatable/AnimatableValue.h"
 #include "sky/engine/core/animation/css/CSSAnimatableValueFactory.h"
 #include "sky/engine/core/animation/css/CSSAnimations.h"
 #include "sky/engine/core/css/CSSCalculationValue.h"
 #include "sky/engine/core/css/CSSFontSelector.h"
-#include "sky/engine/core/css/CSSKeyframeRule.h"
-#include "sky/engine/core/css/CSSKeyframesRule.h"
-#include "sky/engine/core/css/CSSRuleList.h"
 #include "sky/engine/core/css/CSSSelector.h"
-#include "sky/engine/core/css/CSSStyleRule.h"
 #include "sky/engine/core/css/CSSValueList.h"
 #include "sky/engine/core/css/CSSValuePool.h"
 #include "sky/engine/core/css/ElementRuleCollector.h"
 #include "sky/engine/core/css/FontFace.h"
 #include "sky/engine/core/css/MediaQueryEvaluator.h"
 #include "sky/engine/core/css/RuleSet.h"
+#include "sky/engine/core/css/StyleKeyframe.h"
 #include "sky/engine/core/css/StylePropertySet.h"
 #include "sky/engine/core/css/StyleSheetContents.h"
 #include "sky/engine/core/css/parser/BisonCSSParser.h"
 #include "sky/engine/core/css/resolver/AnimatedStyleBuilder.h"
 #include "sky/engine/core/css/resolver/MatchResult.h"
 #include "sky/engine/core/css/resolver/MediaQueryResult.h"
 #include "sky/engine/core/css/resolver/SharedStyleFinder.h"
 #include "sky/engine/core/css/resolver/StyleAdjuster.h"
 #include "sky/engine/core/css/resolver/StyleResolverState.h"
 #include "sky/engine/core/css/resolver/StyleResolverStats.h"
@@ skipping 887 matching lines @@
 bool StyleResolver::mediaQueryAffectedByViewportChange() const
 {
     for (unsigned i = 0; i < m_viewportDependentMediaQueryResults.size(); ++i) {
         if (m_medium->eval(m_viewportDependentMediaQueryResults[i]->expression()) != m_viewportDependentMediaQueryResults[i]->result())
             return true;
     }
     return false;
 }
 
 } // namespace blink