Add support for 'nocompile' to IDL schema compiler.

tools/json_schema_compiler/json_schema_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-from json_schema import CachedLoad
+import json_schema
 import json_schema_test
 import unittest
 
 class JsonSchemaUnittest(unittest.TestCase):
   def testNocompile(self):
     compiled = [
       {
         "namespace": "compile",
         "functions": [],
         "types":     {}
@@ skipping 48 matching lines @@
               },
               "four": {
                 "key": "value"
               }
             }
           }
         }
       }
     ]
 
-    self.assertEquals(compiled, CachedLoad('test/json_schema_test.json'))
+    schema = json_schema.CachedLoad('test/json_schema_test.json')
+    self.assertEquals(compiled, json_schema.DeleteNocompileNodes(schema))
 
 if __name__ == '__main__':
   unittest.main()