Introduce TerminatedArray<T> type to make data-structure used by RuleSet visible at the type level.

Source/core/css/CSSTestHelper.h

 /*
  * 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 35 matching lines @@
 // ... examine RuleSet to find the rule and test properties on it.
 
 class CSSTestHelper {
 public:
     CSSTestHelper();
     ~CSSTestHelper();
 
     void addCSSRules(const char* ruleText);
     RuleSet& ruleSet();
 
-    // Returns the number of rules in the given RuleData array.
-    static int numRules(const RuleData*);
-    // Returns the data at index i (must be less than numNules())
-    static const RuleData& getRule(const RuleData*, int index);
 private:
     RefPtr<Document> m_document;
     RefPtr<CSSStyleSheet> m_styleSheet;
 };
 
 } // namespace WebCore
 
 #endif // CSSTestHelper_h