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

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

Index: third_party/WebKit/Source/core/frame/UseCounter.cpp
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.cpp b/third_party/WebKit/Source/core/frame/UseCounter.cpp
index e3e2de8e6f5c824b278ace6428042ae63ff79900..b40b1e293dfea021224eebf57ce5fa78df06435b 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.cpp
+++ b/third_party/WebKit/Source/core/frame/UseCounter.cpp
@@ -738,8 +738,7 @@ void UseCounter::countCrossOriginIframe(const Document& document, Feature featur
 
 void UseCounter::count(CSSParserMode cssParserMode, CSSPropertyID property)
 {
-    DCHECK(property >= firstCSSProperty);
-    DCHECK(property <= lastUnresolvedCSSProperty);
+    DCHECK(isPropertyIDWithName(property));
 
     if (!isUseCounterEnabledForMode(cssParserMode) || m_muteCount)
         return;