Fix a bug in tpu.py and xla.py that while creating an identity node f…

…or control input edges under rewrite context, the parent control flow context is lost. (tensorflow#23446)

PiperOrigin-RevId: 219724472

Fixed the issue that each invocation of model.fit/evaluate/predict mo…

…difies the (tensorflow#23280)

graph.

PiperOrigin-RevId: 218793646

Update version information in preparation for 1.12.0-rc1 (tensorflow#…

…23028)

Merge pull request tensorflow#22782 from tensorflow/rel-notes-1-12

Rel notes 1 12

Final version strings for 1.11.0 (tensorflow#22513)

Update version strings to rc2 (tensorflow#22419)

Update 1.11.0-rc0 version strings to 1.11.0-rc1 (tensorflow#22284)

Not running no_gpu tagged tests on GPU and not running benchmark-test…

… for any pip builds. (tensorflow#22220)

PiperOrigin-RevId: 212541571

Merge pull request tensorflow#21709 from saeta/fix_tpu

Cherry-picks for Keras on Cloud TPUs

Merge pull request tensorflow#21425 from saeta/fix_tpu

Refactor dependencies so keras_support can be imported directly.