message: TPU: Mark keras_support as deprecated.
diff: @@ -55,7 +55,6 @@ import numpy as np
  import six
  from tensorflow.contrib.cluster_resolver.python.training import tpu_cluster_resolver as tpu_cluster_resolver_lib
  -from tensorflow.contrib.framework.python.framework import experimental
  from tensorflow.contrib.tpu.python.ops import tpu_ops
  from tensorflow.contrib.tpu.python.tpu import keras_tpu_variables
  from tensorflow.contrib.tpu.python.tpu import tpu
  @@ -94,6 +93,7 @@ from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import tf_logging as logging
  +from tensorflow.python.util.deprecation import deprecated
  # TODO(b/114775106): temporary shim to optionally initialize the TPU
  @@ -2172,7 +2172,10 @@ Output shape: %(output_shape)s
  # pylint: enable=bad-continuation
  -@experimental
  +@deprecated(
  + '2019-02-20', 'Switch to tf.contrib.distribute.TPUStrategy. '
  + 'https://www.tensorflow.org/api_docs/python/tf/contrib/distribute/DistributionStrategy'
  +)
  def tpu_model(model, strategy=None):
  """Copy `model` along with weights to the TPU.
  