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

Source/core/css/CSSTestHelper.h

Index: Source/core/css/CSSTestHelper.h
diff --git a/Source/core/css/CSSTestHelper.h b/Source/core/css/CSSTestHelper.h
index ea87f1e7755e605d415bdfe486d20bce44019047..58aa9336808aa12d5d96fe37e09559af5423c858 100644
--- a/Source/core/css/CSSTestHelper.h
+++ b/Source/core/css/CSSTestHelper.h
@@ -53,10 +53,6 @@ public:
     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;