Basic implementation of @apply

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/CSSParserString.h"
 #include "core/frame/UseCounter.h"
 
 namespace blink {
@@ skipping 13 matching lines @@
     if (name.equalIgnoringASCIICase("namespace"))
         return CSSAtRuleNamespace;
     if (name.equalIgnoringASCIICase("page"))
         return CSSAtRulePage;
     if (name.equalIgnoringASCIICase("supports"))
         return CSSAtRuleSupports;
     if (name.equalIgnoringASCIICase("viewport"))
         return CSSAtRuleViewport;
     if (name.equalIgnoringASCIICase("-webkit-keyframes"))
         return CSSAtRuleWebkitKeyframes;
+    if (name.equalIgnoringASCIICase("apply"))
+        return CSSAtRuleApply;
     return CSSAtRuleInvalid;
 }
 
 void countAtRule(UseCounter* useCounter, CSSAtRuleID ruleId)
 {
     ASSERT(useCounter);
     UseCounter::Feature feature;
 
     switch (ruleId) {
     case CSSAtRuleCharset:
@@ skipping 21 matching lines @@
         feature = UseCounter::CSSAtRuleSupports;
         break;
     case CSSAtRuleViewport:
         feature = UseCounter::CSSAtRuleViewport;
         break;
 
     case CSSAtRuleWebkitKeyframes:
         feature = UseCounter::CSSAtRuleWebkitKeyframes;
         break;
 
+    case CSSAtRuleApply:
+        feature = UseCounter::CSSAtRuleApply;
+        break;
+
     case CSSAtRuleInvalid:
         // fallthrough
     default:
         ASSERT_NOT_REACHED();
         return;
     }
     useCounter->count(feature);
 }
 
 } // namespace blink