Make a function to query whether a CSSPropertyID is valid and whether it has a name.

third_party/WebKit/Source/core/frame/UseCounter.cpp

 /*
  * Copyright (C) 2012 Google, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 720 matching lines @@
 
 void UseCounter::countCrossOriginIframe(const Document& document, Feature feature)
 {
     LocalFrame* frame = document.frame();
     if (frame && frame->isCrossOriginSubframe())
         count(frame, feature);
 }
 
 void UseCounter::count(CSSParserMode cssParserMode, CSSPropertyID property)
 {
-    DCHECK(property >= firstCSSProperty);
-    DCHECK(property <= lastUnresolvedCSSProperty);
+    DCHECK(isPropertyIDWithName(property));
 
     if (!isUseCounterEnabledForMode(cssParserMode) || m_muteCount)
         return;
 
     if (!m_CSSRecorded.quickGet(property)) {
         // Note that HTTPArchive tooling looks specifically for this event - see https://github.com/HTTPArchive/httparchive/issues/59
         TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("blink.feature_usage"), "CSSFeatureFirstUsed", "feature", property);
         cssHistogram().count(mapCSSPropertyIdToCSSSampleIdForHistogram(property));
         m_CSSRecorded.quickSet(property);
     }
@@ skipping 108 matching lines @@
         }
     }
 
     if (needsPagesMeasuredUpdate)
         cssPropertiesHistogram.count(totalPagesMeasuredCSSSampleId());
 
     m_CSSBits.clearAll();
 }
 
 } // namespace blink