Convert //sync from scoped_ptr to std::unique_ptr

sync/test/engine/test_directory_setter_upper.h

Index: sync/test/engine/test_directory_setter_upper.h
diff --git a/sync/test/engine/test_directory_setter_upper.h b/sync/test/engine/test_directory_setter_upper.h
index 72b4ee9eafa01f7045b94826f3f854081312c267..cd9674719212464854d9832191669b920cd9a0ee 100644
--- a/sync/test/engine/test_directory_setter_upper.h
+++ b/sync/test/engine/test_directory_setter_upper.h
@@ -29,11 +29,11 @@
 #ifndef SYNC_TEST_ENGINE_TEST_DIRECTORY_SETTER_UPPER_H_
 #define SYNC_TEST_ENGINE_TEST_DIRECTORY_SETTER_UPPER_H_
 
+#include <memory>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "sync/test/fake_sync_encryption_handler.h"
 #include "sync/test/null_directory_change_delegate.h"
 #include "sync/util/test_unrecoverable_error_handler.h"
@@ -75,13 +75,13 @@ class TestDirectorySetterUpper {
 
  private:
   syncable::NullDirectoryChangeDelegate delegate_;
-  scoped_ptr<syncable::TestTransactionObserver> test_transaction_observer_;
+  std::unique_ptr<syncable::TestTransactionObserver> test_transaction_observer_;
   TestUnrecoverableErrorHandler handler_;
 
   void RunInvariantCheck();
 
   FakeSyncEncryptionHandler encryption_handler_;
-  scoped_ptr<syncable::Directory> directory_;
+  std::unique_ptr<syncable::Directory> directory_;
   std::string name_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDirectorySetterUpper);