message: Reenable tests since the TODO for grappler has been addressed.
diff: @@ -1695,8 +1695,7 @@ class FunctionTest(test.TestCase, parameterized.TestCase):
  'be Tensors;.*'):
  graph_function('Not a Tensor.')
  - # TODO(scottzhu): Revive the test once the grappler plugin is updated.
  - def disabled_testSwapImplementationWithGrapplerPlugin(self):
  + def testSwapImplementationWithGrapplerPlugin(self):
  rewrites = rewriter_config_pb2.RewriterConfig()
  # function_optimizer has to be turn off, otherwise it will delete the
  # registered function if it does not get called.
  