[oilpan] Rename visit to mark.

Source/core/html/HTMLCollection.cpp

Index: Source/core/html/HTMLCollection.cpp
diff --git a/Source/core/html/HTMLCollection.cpp b/Source/core/html/HTMLCollection.cpp
index 06bbbcf7d68ceceed955f1987cc1b756257f603a..3f0a92260453d40a989f43e26be463937ec56ee9 100644
--- a/Source/core/html/HTMLCollection.cpp
+++ b/Source/core/html/HTMLCollection.cpp
@@ -730,12 +730,8 @@ void HTMLCollection::append(NodeCacheMap& map, const AtomicString& key, Element*
 void HTMLCollection::trace(Visitor* visitor)
 {
     LiveNodeListBase::trace(visitor);
-    NodeCacheMap::const_iterator end = m_idCache.end();
-    for (NodeCacheMap::const_iterator it = m_idCache.begin(); it != end; ++it)
-        visitor->trace(it->value);
-    end = m_nameCache.end();
-    for (NodeCacheMap::const_iterator it = m_nameCache.begin(); it != end; ++it)
-        visitor->trace(it->value);
+    visitor->trace(m_idCache);
+    visitor->trace(m_nameCache);
 }
 
 } // namespace WebCore