message: Run xla FunctionTest with (and without) C API
diff: @@ -24,10 +24,12 @@ from tensorflow.compiler.tests.xla_test import XLATestCase
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import function
  +from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.platform import googletest
  +@test_util.with_c_api
  class FunctionTest(XLATestCase):
  def testFunction(self):
  