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

chromecast/base/error_codes_unittest.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 "base/base_paths.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/test/scoped_path_override.h"
 #include "chromecast/base/error_codes.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromecast {
 
 class ErrorCodesTest : public testing::Test {
  protected:
   ErrorCodesTest() {}
   ~ErrorCodesTest() override {}
 
   void SetUp() override {
     // Set up a temporary directory which will be used as our fake home dir.
-    ASSERT_TRUE(base::CreateNewTempDirectory("", &fake_home_dir_));
+    ASSERT_TRUE(fake_home_dir_.CreateUniqueTempDir());
     path_override_.reset(
-        new base::ScopedPathOverride(base::DIR_HOME, fake_home_dir_));
+        new base::ScopedPathOverride(base::DIR_HOME, fake_home_dir_.path()));
   }
 
-  base::FilePath fake_home_dir_;
+  base::FilePath home_path() const { return fake_home_dir_.path(); }
+
+ private:
+  base::ScopedTempDir fake_home_dir_;
   scoped_ptr<base::ScopedPathOverride> path_override_;
 };
 
 TEST_F(ErrorCodesTest, GetInitialErrorCodeReturnsNoErrorIfMissingFile) {
   EXPECT_EQ(NO_ERROR, GetInitialErrorCode());
 }
 
 TEST_F(ErrorCodesTest, SetInitialErrorCodeSucceedsWithNoError) {
   ASSERT_TRUE(SetInitialErrorCode(NO_ERROR));
 
   // File should not be written.
-  ASSERT_FALSE(base::PathExists(fake_home_dir_.Append("initial_error")));
+  ASSERT_FALSE(base::PathExists(home_path().Append("initial_error")));
   EXPECT_EQ(NO_ERROR, GetInitialErrorCode());
 }
 
 TEST_F(ErrorCodesTest, SetInitialErrorCodeSucceedsWithValidErrors) {
   // Write initial error and read it from the file.
   EXPECT_TRUE(SetInitialErrorCode(ERROR_WEB_CONTENT_RENDER_VIEW_GONE));
-  EXPECT_TRUE(base::PathExists(fake_home_dir_.Append("initial_error")));
+  EXPECT_TRUE(base::PathExists(home_path().Append("initial_error")));
   EXPECT_EQ(ERROR_WEB_CONTENT_RENDER_VIEW_GONE, GetInitialErrorCode());
 
   // File should be updated with most recent error.
   EXPECT_TRUE(SetInitialErrorCode(ERROR_UNKNOWN));
-  EXPECT_TRUE(base::PathExists(fake_home_dir_.Append("initial_error")));
+  EXPECT_TRUE(base::PathExists(home_path().Append("initial_error")));
   EXPECT_EQ(ERROR_UNKNOWN, GetInitialErrorCode());
 
   // File should be updated with most recent error.
   EXPECT_TRUE(SetInitialErrorCode(ERROR_WEB_CONTENT_NAME_NOT_RESOLVED));
-  EXPECT_TRUE(base::PathExists(fake_home_dir_.Append("initial_error")));
+  EXPECT_TRUE(base::PathExists(home_path().Append("initial_error")));
   EXPECT_EQ(ERROR_WEB_CONTENT_NAME_NOT_RESOLVED, GetInitialErrorCode());
 
   // File should be removed after writing NO_ERROR.
   EXPECT_TRUE(SetInitialErrorCode(NO_ERROR));
-  EXPECT_FALSE(base::PathExists(fake_home_dir_.Append("initial_error")));
+  EXPECT_FALSE(base::PathExists(home_path().Append("initial_error")));
   EXPECT_EQ(NO_ERROR, GetInitialErrorCode());
 }
 
 }  // namespace chromecast