message: Fixed memory_stats_ops_test
  Added explicit dependency to avoid matrix free prior to stats op execution.
diff: @@ -77,8 +77,9 @@ class MemoryStatsOpsTest(test_util.TensorFlowTestCase):
  bytes_in_use_op = memory_stats_ops.BytesInUse()
  with ops.control_dependencies([bytes_in_use_op]):
  b = random_ops.random_uniform(matrix_shape, dtype=dtype)
  + c = math_ops.matmul(a, b)
  - _, bytes_in_use, max_bytes_in_use = sess.run([a, bytes_in_use_op,
  + _, bytes_in_use, max_bytes_in_use = sess.run([c, bytes_in_use_op,
  max_bytes_in_use_op])
  # intermediate result allocates 1 matrix, max usage is at least 2
  