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 727 matching lines @@
 
 void UseCounter::countCrossOriginIframe(const Document& document, Feature feature)
 {
     Frame* frame = document.frame();
     if (frame && frame->isCrossOrigin())
         count(frame, feature);
 }
 
 void UseCounter::count(CSSParserMode cssParserMode, CSSPropertyID feature)
 {
-    ASSERT(feature >= firstCSSProperty);
-    ASSERT(feature <= lastUnresolvedCSSProperty);
+    DCHECK(propertyHasName(feature));
 
     if (!isUseCounterEnabledForMode(cssParserMode) || m_muteCount)
         return;
 
     m_CSSFeatureBits.quickSet(feature);
 }
 
 void UseCounter::count(Feature feature)
 {
     ASSERT(Deprecation::deprecationMessage(feature).isEmpty());
@@ skipping 17 matching lines @@
 UseCounter* UseCounter::getFrom(const StyleSheetContents* sheetContents)
 {
     // FIXME: We may want to handle stylesheets that have multiple owners
     //        https://crbug.com/242125
     if (sheetContents && sheetContents->hasSingleOwnerNode())
         return getFrom(sheetContents->singleOwnerDocument());
     return 0;
 }
 
 } // namespace blink