Have bindings layer assume and insist that all interface types are GCed.

third_party/WebKit/Source/modules/webdatabase/SQLTransaction.idl

 /*
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // http://www.w3.org/TR/webdatabase/#sqltransaction
 
 typedef sequence<any> ObjectArray;
 
 [
-    GarbageCollected,
     NoInterfaceObject,
 ] interface SQLTransaction {
     // The spec defines |arguments| to be an "optional ObjectArray" though it defines the
     // behavior when null is being passed.
     [RaisesException, CallWith=ScriptState] void executeSql(DOMString sqlStatement,
                                                             optional ObjectArray? arguments,
                                                             optional SQLStatementCallback callback,
                                                             optional SQLStatementErrorCallback errorCallback);
 
 };