Change CSSParserContext to have a Document handle (vs UseCounter).

third_party/WebKit/Source/core/css/parser/CSSAtRuleID.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSAtRuleID_h
 #define CSSAtRuleID_h
 
 #include "wtf/text/StringView.h"
 
 namespace blink {
 
-class UseCounter;
+class CSSParserContext;
 
 enum CSSAtRuleID {
   CSSAtRuleInvalid = 0,
 
   CSSAtRuleCharset = 1,
   CSSAtRuleFontFace = 2,
   CSSAtRuleImport = 3,
   CSSAtRuleKeyframes = 4,
   CSSAtRuleMedia = 5,
   CSSAtRuleNamespace = 6,
   CSSAtRulePage = 7,
   CSSAtRuleSupports = 8,
   CSSAtRuleViewport = 9,
 
   CSSAtRuleWebkitKeyframes = 10,
   CSSAtRuleApply = 11,
 };
 
 CSSAtRuleID cssAtRuleID(StringView name);
 
-void countAtRule(UseCounter*, CSSAtRuleID);
+void countAtRule(const CSSParserContext*, CSSAtRuleID);
 
 }  // namespace blink
 
 #endif  // CSSAtRuleID_h