Update idlsync.py to pull in dependencies required for chrome api generation.

third_party/chrome/tools/json_schema_compiler/schema_util_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 schema_util import JsFunctionNameToClassName
 from schema_util import StripNamespace
 import unittest
 
 class SchemaUtilTest(unittest.TestCase):
   def testStripNamespace(self):
     self.assertEquals('Bar', StripNamespace('foo.Bar'))
     self.assertEquals('Baz', StripNamespace('Baz'))
 
   def testJsFunctionNameToClassName(self):
     self.assertEquals('FooBar', JsFunctionNameToClassName('foo', 'bar'))
     self.assertEquals('FooBar',
                       JsFunctionNameToClassName('experimental.foo', 'bar'))
     self.assertEquals('FooBarBaz',
                       JsFunctionNameToClassName('foo.bar', 'baz'))
     self.assertEquals('FooBarBaz',
                       JsFunctionNameToClassName('experimental.foo.bar', 'baz'))
 
 if __name__ == '__main__':
   unittest.main()