Change generator to pass in domData in calls to createWrapper.

tools/dom/scripts/systemnative.py

Index: tools/dom/scripts/systemnative.py
===================================================================
--- tools/dom/scripts/systemnative.py	(revision 30992)
+++ tools/dom/scripts/systemnative.py	(working copy)
@@ -426,7 +426,7 @@
         '            DartDOMWrapper::lookupWrapper(domData, isNode, value);\n'
         '        if (result)\n'
         '            return Dart_HandleFromWeakPersistent(result);\n'
-        '        return createWrapper(value);\n'
+        '        return createWrapper(domData, value);\n'
         '    }\n'
         '    static void returnToDart(Dart_NativeArguments args,\n'
         '                             NativeType* value)\n'
@@ -439,7 +439,7 @@
         '            if (result)\n'
         '                Dart_SetWeakHandleReturnValue(args, result);\n'
         '            else\n'
-        '                Dart_SetReturnValue(args, createWrapper(value));\n'
+        '                Dart_SetReturnValue(args, createWrapper(domData, value));\n'
         '        }\n'
         '    }\n',
         )
@@ -449,12 +449,11 @@
         'CPPPureInterface' in ext_attrs or
         self._interface_type_info.custom_to_dart()):
       to_dart_emitter.Emit(
-          '    static Dart_Handle createWrapper(NativeType* value);\n')
+          '    static Dart_Handle createWrapper(DartDOMData* domData, NativeType* value);\n')
     else:
       to_dart_emitter.Emit(
-          '    static Dart_Handle createWrapper(NativeType* value)\n'
+          '    static Dart_Handle createWrapper(DartDOMData* domData, NativeType* value)\n'
           '    {\n'
-          '        DartDOMData* domData = DartDOMData::current();\n'
           '        return DartDOMWrapper::createWrapper<Dart$(INTERFACE)>(domData, value);\n'
           '    }\n',
           INTERFACE=self._interface.id)