wrap_jso should wrap JsArray as well, not always call wrap on its contents

tools/dom/scripts/generator.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for systems to generate
 Dart APIs from the IDL database."""
 
 import copy
 import json
@@ skipping 497 matching lines @@
       if self.requires_named_arguments and param_info.is_optional:
         return '%s : %s' % (param_info.name, param_info.name)
       else:
         return param_info.name
 
     if parameter_count is None:
       parameter_count = len(self.param_infos)
     return ', '.join(map(param_name, self.param_infos[:parameter_count]))
 
   def isCallback(self, type_registry, type_id):
-    if type_id:
+    if type_id and not type_id.endswith('[]'):
       callback_type = type_registry._database._all_interfaces[type_id]
       return callback_type.operations[0].id == 'handleEvent' if len(callback_type.operations) > 0 else False
     else:
       return False
 
   def ParametersAsListOfVariables(self, parameter_count=None, type_registry=None, dart_js_interop=False, backend = None):
     """Returns a list of the first parameter_count parameter names
     as raw variables.
     """
     isRemoveOperation = self.name == 'removeEventListener' or self.name == 'removeListener'
@@ skipping 910 matching lines @@
 def wrap_unwrap_type_blink(return_type, type_registry):
     """Returns True if the type is a blink type that requires wrap_jso or
     unwrap_jso"""
     if return_type and return_type.startswith('Html'):
         return_type = return_type.replace('Html', 'HTML', 1)
     return (type_registry.HasInterface(return_type) or not(return_type) or
             return_type == 'Object' or
             return_type == 'Future' or
             return_type == 'SqlDatabase' or # renamed to Database
             return_type == 'HTMLElement' or
-            return_type == 'MutationObserver')
+            return_type == 'MutationObserver' or
+            return_type.endswith('[]'))
 
 def wrap_type_blink(return_type, type_registry):
     """Returns True if the type is a blink type that requires wrap_jso but
     NOT unwrap_jso"""
     return (return_type == 'Map' or
             return_type == 'Rectangle')
 
 def wrap_return_type_blink(return_type, type_name, type_registry):
     """Returns True if we should wrap the returned value. This checks
     a number of different variations, calling the more basic functions
     above."""
     return (wrap_unwrap_type_blink(return_type, type_registry) or
             wrap_unwrap_type_blink(type_name, type_registry) or
             wrap_type_blink(return_type, type_registry) or
             wrap_unwrap_list_blink(return_type, type_registry))