Oilpan: Remove a visitor parameter from isHeapObjectAlive

Source/core/css/resolver/MatchedPropertiesCache.h

Index: Source/core/css/resolver/MatchedPropertiesCache.h
diff --git a/Source/core/css/resolver/MatchedPropertiesCache.h b/Source/core/css/resolver/MatchedPropertiesCache.h
index 19b654ebe87bbc234820a0048cec007c3e584673..6c1a7fb7c55430f96660382436872ce79417dd3c 100644
--- a/Source/core/css/resolver/MatchedPropertiesCache.h
+++ b/Source/core/css/resolver/MatchedPropertiesCache.h
@@ -70,7 +70,7 @@ struct CachedMatchedPropertiesHashTraits : HashTraits<Member<CachedMatchedProper
             // in the CachedMatchedProperties value contain a dead "properties" field.
             // If there is a dead field the entire cache entry is removed.
             for (const auto& matchedProperties : cachedProperties->matchedProperties) {
-                if (!visitor->isHeapObjectAlive(matchedProperties.properties)) {
+                if (!Heap::isHeapObjectAlive(matchedProperties.properties)) {
                     // For now report the cache entry as dead. This might not
                     // be the final result if in a subsequent call for this entry,
                     // the "properties" field has been marked via another path.
@@ -82,7 +82,7 @@ struct CachedMatchedPropertiesHashTraits : HashTraits<Member<CachedMatchedProper
         // had a dead "properties" field so trace CachedMatchedProperties strongly.
         // FIXME: traceInCollection is also called from WeakProcessing to check if the entry is dead.
         // Avoid calling trace in that case by only calling trace when cachedProperties is not yet marked.
-        if (!visitor->isHeapObjectAlive(cachedProperties))
+        if (!Heap::isHeapObjectAlive(cachedProperties))
             visitor->trace(cachedProperties);
         return false;
     }