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

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

 // 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.
 
 #include "core/css/parser/CSSAtRuleID.h"
 
+#include "core/css/parser/CSSParserContext.h"
 #include "core/frame/UseCounter.h"
 
 namespace blink {
 
 CSSAtRuleID cssAtRuleID(StringView name) {
   if (equalIgnoringASCIICase(name, "charset"))
     return CSSAtRuleCharset;
   if (equalIgnoringASCIICase(name, "font-face"))
     return CSSAtRuleFontFace;
   if (equalIgnoringASCIICase(name, "import"))
@@ skipping 10 matching lines @@
     return CSSAtRuleSupports;
   if (equalIgnoringASCIICase(name, "viewport"))
     return CSSAtRuleViewport;
   if (equalIgnoringASCIICase(name, "-webkit-keyframes"))
     return CSSAtRuleWebkitKeyframes;
   if (equalIgnoringASCIICase(name, "apply"))
     return CSSAtRuleApply;
   return CSSAtRuleInvalid;
 }
 
-void countAtRule(UseCounter* useCounter, CSSAtRuleID ruleId) {
-  ASSERT(useCounter);
+void countAtRule(const CSSParserContext* context, CSSAtRuleID ruleId) {
   UseCounter::Feature feature;
 
   switch (ruleId) {
     case CSSAtRuleCharset:
       feature = UseCounter::CSSAtRuleCharset;
       break;
     case CSSAtRuleFontFace:
       feature = UseCounter::CSSAtRuleFontFace;
       break;
     case CSSAtRuleImport:
@@ skipping 25 matching lines @@
     case CSSAtRuleApply:
       feature = UseCounter::CSSAtRuleApply;
       break;
 
     case CSSAtRuleInvalid:
     // fallthrough
     default:
       ASSERT_NOT_REACHED();
       return;
   }
-  useCounter->count(feature);
+  context->count(feature);
 }
 
 }  // namespace blink