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 3f8b28145a80dd664e03efecd65de04f7d4df42d..544635c1487b36a984da220ffa40cd8efc55a637 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.cpp
+++ b/third_party/WebKit/Source/core/frame/UseCounter.cpp
@@ -745,8 +745,7 @@ void UseCounter::countCrossOriginIframe(const Document& document, Feature featur
 
 void UseCounter::count(CSSParserMode cssParserMode, CSSPropertyID feature)
 {
-    ASSERT(feature >= firstCSSProperty);
-    ASSERT(feature <= lastUnresolvedCSSProperty);
+    DCHECK(propertyHasName(feature));
 
     if (!isUseCounterEnabledForMode(cssParserMode) || m_muteCount)
         return;