Remove the CSSOM.

sky/engine/core/css/CSSTestHelper.cpp

 /*
  * Copyright (c) 2014, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/css/CSSTestHelper.h"
 
-#include "sky/engine/core/css/CSSRuleList.h"
 #include "sky/engine/core/css/CSSStyleSheet.h"
 #include "sky/engine/core/css/RuleSet.h"
 #include "sky/engine/core/css/StyleSheetContents.h"
 #include "sky/engine/core/dom/Document.h"
 #include "sky/engine/wtf/text/WTFString.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
 
@@ skipping 17 matching lines @@
 
 void CSSTestHelper::addCSSRules(const char* cssText)
 {
     TextPosition position;
     unsigned sheetLength = m_styleSheet->length();
     ASSERT_TRUE(m_styleSheet->contents()->parseStringAtPosition(cssText, position, true));
     ASSERT_TRUE(m_styleSheet->length() > sheetLength);
 }
 
 } // namespace blink