Manage WebSQL callbacks with OwnPtr instead of refcounting

Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp

Index: Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp
diff --git a/Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp b/Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp
index a59ad6c79d104f8d38238287b4fb2a4e05cded03..6981e9bee7a6c866d639b4ced4bae554c5675230 100644
--- a/Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp
+++ b/Source/modules/webdatabase/WorkerGlobalScopeWebDatabase.cpp
@@ -42,7 +42,7 @@
 
 namespace WebCore {
 
-PassRefPtr<Database> WorkerGlobalScopeWebDatabase::openDatabase(WorkerGlobalScope* context, const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback, ExceptionState& exceptionState)
+PassRefPtr<Database> WorkerGlobalScopeWebDatabase::openDatabase(WorkerGlobalScope* context, const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassOwnPtr<DatabaseCallback> creationCallback, ExceptionState& exceptionState)
 {
     DatabaseManager& dbManager = DatabaseManager::manager();
     RefPtr<Database> database;
@@ -60,7 +60,7 @@ PassRefPtr<Database> WorkerGlobalScopeWebDatabase::openDatabase(WorkerGlobalScop
     return database.release();
 }
 
-PassRefPtr<DatabaseSync> WorkerGlobalScopeWebDatabase::openDatabaseSync(WorkerGlobalScope* context, const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassRefPtr<DatabaseCallback> creationCallback, ExceptionState& exceptionState)
+PassRefPtr<DatabaseSync> WorkerGlobalScopeWebDatabase::openDatabaseSync(WorkerGlobalScope* context, const String& name, const String& version, const String& displayName, unsigned long estimatedSize, PassOwnPtr<DatabaseCallback> creationCallback, ExceptionState& exceptionState)
 {
     DatabaseManager& dbManager = DatabaseManager::manager();
     RefPtr<DatabaseSync> database;