[Chromecast] Use ScopedTemp[File|Dir] in tests.

chromecast/base/scoped_temp_file.cc

+// Copyright 2015 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 "chromecast/base/scoped_temp_file.h"
+#include "base/files/file_util.h"
+#include "base/logging.h"
+
+namespace chromecast {
+
+ScopedTempFile::ScopedTempFile() {
+  CHECK(base::CreateTemporaryFile(&path_));
+}
+
+ScopedTempFile::~ScopedTempFile() {
+  if (FileExists()) {
+    // Since this is a file, set the -rf flag to false.
+    CHECK(base::DeleteFile(path_, false));
+  }
+}
+
+bool ScopedTempFile::FileExists() const {
+  return base::PathExists(path_);
+}
+
+int ScopedTempFile::Write(const std::string& str) {
+  CHECK(FileExists());
+  return base::WriteFile(path_, str.c_str(), str.size());
+}
+
+std::string ScopedTempFile::Read() const {
+  CHECK(FileExists());
+  std::string result;
+  ReadFileToString(path_, &result);

[bcf, 2015/12/08 18:56:55]

How about a CHECK for this?

[slan, 2015/12/08 19:08:48]

Done.

+  return result;
+}
+
+}  // namespace chromecast