Remove ScopedTempDir from sync test utility class

sync/test/engine/test_directory_setter_upper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sync/test/engine/test_directory_setter_upper.h"
 
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
 #include "base/location.h"
 #include "base/string_util.h"
@@ skipping 11 matching lines @@
 
 TestDirectorySetterUpper::~TestDirectorySetterUpper() {}
 
 void TestDirectorySetterUpper::SetUp() {
   directory_.reset(new syncable::Directory(
       new syncable::InMemoryDirectoryBackingStore(name_),
       &handler_,
       NULL,
       &encryption_handler_,
       encryption_handler_.cryptographer()));
-  ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   ASSERT_EQ(syncable::OPENED, directory_->Open(
           name_, &delegate_, NullTransactionObserver()));
 }
 
 void TestDirectorySetterUpper::TearDown() {
   if (!directory()->good())
     return;
 
   RunInvariantCheck();
   directory()->SaveChanges();
   RunInvariantCheck();
   directory()->SaveChanges();
 
   directory_.reset();
-
-  ASSERT_TRUE(temp_dir_.Delete());
 }
 
 void TestDirectorySetterUpper::RunInvariantCheck() {
   // Check invariants for all items.
   syncable::ReadTransaction trans(FROM_HERE, directory());
 
   // The TestUnrecoverableErrorHandler that this directory was constructed with
   // will handle error reporting, so we can safely ignore the return value.
   directory()->FullyCheckTreeInvariants(&trans);
 }
 
 }  // namespace syncer