message: Fix and enable ApplicationModelTest.
diff: @@ -26,6 +26,7 @@ from tensorflow.python.distribute import mirrored_strategy
  from tensorflow.python.eager import context
  from tensorflow.python.framework import config as tf_config
  from tensorflow.python.framework import dtypes
  +from tensorflow.python.framework import ops
  from tensorflow.python.keras import backend
  from tensorflow.python.keras import combinations
  from tensorflow.python.keras import keras_parameterized
  @@ -863,8 +864,8 @@ class ApplicationModelTest(keras_parameterized.TestCase):
  ('resnet50', resnet.ResNet50),
  )
  def test_application_model(self, app):
  - self.skipTest('b/190747991: OOMs when a GPU is used')
  - with policy.policy_scope('mixed_float16'):
  + # Run on CPU since model weights may exhaust GPU memory
  + with policy.policy_scope('mixed_float16'), ops.device('/CPU:0'):
  app(weights=None)
  