Cheaper thread-safe atomic initialization of static references.

Source/modules/webdatabase/Database.cpp

Index: Source/modules/webdatabase/Database.cpp
diff --git a/Source/modules/webdatabase/Database.cpp b/Source/modules/webdatabase/Database.cpp
index 316f79e7c087a3563f6b712cec2b87a31965ba3b..11904b2a2cc34bdc3a24a6a8da7848afc064094f 100644
--- a/Source/modules/webdatabase/Database.cpp
+++ b/Source/modules/webdatabase/Database.cpp
@@ -139,7 +139,7 @@ static bool setTextValueInDatabase(SQLiteDatabase& db, const String& query, cons
 // FIXME: move all guid-related functions to a DatabaseVersionTracker class.
 static RecursiveMutex& guidMutex()
 {
-    AtomicallyInitializedStatic(RecursiveMutex&, mutex = *new RecursiveMutex);
+    AtomicallyInitializedStaticReference(RecursiveMutex, mutex, new RecursiveMutex);
     return mutex;
 }