WTF::notFound looks too much like a local variable.

Source/core/html/HTMLImportLoader.cpp

Index: Source/core/html/HTMLImportLoader.cpp
diff --git a/Source/core/html/HTMLImportLoader.cpp b/Source/core/html/HTMLImportLoader.cpp
index b4a09422c1c6498d5b377e9d89269948558fa387..283b757e15eac55a5e38a8ac4c01d34ee05bf8f7 100644
--- a/Source/core/html/HTMLImportLoader.cpp
+++ b/Source/core/html/HTMLImportLoader.cpp
@@ -153,7 +153,7 @@ Document* HTMLImportLoader::importedDocument() const
 
 void HTMLImportLoader::addClient(HTMLImportLoaderClient* client)
 {
-    ASSERT(notFound == m_clients.find(client));
+    ASSERT(kNotFound == m_clients.find(client));
     m_clients.append(client);
     if (isDone())
         client->didFinish();
@@ -161,7 +161,7 @@ void HTMLImportLoader::addClient(HTMLImportLoaderClient* client)
 
 void HTMLImportLoader::removeClient(HTMLImportLoaderClient* client)
 {
-    ASSERT(notFound != m_clients.find(client));
+    ASSERT(kNotFound != m_clients.find(client));
     m_clients.remove(m_clients.find(client));
 }