Remove UseCounter

sky/engine/core/css/parser/CSSParserMode.h

Index: sky/engine/core/css/parser/CSSParserMode.h
diff --git a/sky/engine/core/css/parser/CSSParserMode.h b/sky/engine/core/css/parser/CSSParserMode.h
index 26241f1afeafc498c2c1a886f30f08757563a0e6..51857a620c00bc5960eda6e38f1b4f94f4cd78a0 100644
--- a/sky/engine/core/css/parser/CSSParserMode.h
+++ b/sky/engine/core/css/parser/CSSParserMode.h
@@ -67,18 +67,12 @@ inline bool isCSSViewportParsingEnabledForMode(CSSParserMode mode)
     return false;
 }
 
-class UseCounter;
-
 class CSSParserContext {
     WTF_MAKE_FAST_ALLOCATED;
 public:
-    explicit CSSParserContext(UseCounter*);
-    // FIXME: We shouldn't need the UseCounter argument as we could infer it from the Document
-    // but some callers want to disable use counting (e.g. the WebInspector).
-    CSSParserContext(const Document&, UseCounter*, const KURL& baseURL = KURL());
-    // FIXME: This constructor shouldn't exist if we properly piped the UseCounter through the CSS
-    // subsystem. Currently the UseCounter life time is too crazy and we need a way to override it.
-    CSSParserContext(const CSSParserContext&, UseCounter*);
+    explicit CSSParserContext();
+    CSSParserContext(const Document&, const KURL& baseURL = KURL());
+    CSSParserContext(const CSSParserContext&);
 
     bool operator==(const CSSParserContext&) const;
     bool operator!=(const CSSParserContext& other) const { return !(*this == other); }
@@ -97,13 +91,9 @@ public:
 
     KURL completeURL(const String& url) const;
 
-    UseCounter* useCounter() const { return m_useCounter; }
-
 private:
     KURL m_baseURL;
     Referrer m_referrer;
-
-    UseCounter* m_useCounter;
 };
 
 const CSSParserContext& strictCSSParserContext();