TensorFlow: minor change functions in Env interface.

Switches to return a std::unique_ptr<> to convey transfer of ownership.
Keeps existing functions temporarily for backwards compatibility.

Change file_system.h interface to switch entirely to the new interface,
change all callers. If this breaks someone in the public, the interface
change should be straightforward.
Change: 125127028

1 files changed, 2 insertions, 2 deletions

diff --git a/tensorflow/core/util/tensor_slice_writer.cc b/tensorflow/core/util/tensor_slice_writer.cc
index 74fcbbe649..bef421e8cf 100644
--- a/tensorflow/core/util/tensor_slice_writer.cc
+++ b/tensorflow/core/util/tensor_slice_writer.cc
@@ -68,10 +68,10 @@ class TableBuilder : public TensorSliceWriter::Builder {
 Status CreateTableTensorSliceBuilder(const string& name,
                                      TensorSliceWriter::Builder** builder) {
   *builder = nullptr;
-  WritableFile* f;
+  std::unique_ptr<WritableFile> f;
   Status s = Env::Default()->NewWritableFile(name, &f);
   if (s.ok()) {
-    *builder = new TableBuilder(name, f);
+    *builder = new TableBuilder(name, f.release());
     return Status::OK();
   } else {
     return s;