message: Enabled TENSORFLOW_USE_ABSL for mobile. TENSORFLOW_USE_ABSL is now enabled in all cases.
  This lets TENSORFLOW_USE_ABSL be removed (as it will always be true), and is necessary to migrate TensorFlow to absl.
diff: @@ -575,11 +575,11 @@ def tf_additional_lib_defines():
  "//tensorflow:with_jemalloc_linux_x86_64": ["TENSORFLOW_USE_JEMALLOC"],
  "//tensorflow:with_jemalloc_linux_ppc64le":["TENSORFLOW_USE_JEMALLOC"],
  "//conditions:default": [],
  - }) + if_not_mobile(["TENSORFLOW_USE_ABSL"])
  + }) + ["TENSORFLOW_USE_ABSL"]
  def tf_additional_lib_deps():
  """Additional dependencies needed to build TF libraries."""
  - return if_not_mobile(["@com_google_absl//absl/base:base"]) + if_static(
  + return ["@com_google_absl//absl/base:base"] + if_static(
  ["@nsync//:nsync_cpp"],
  ["@nsync//:nsync_headers"]
  ) + select({
  