ChromeOS: Per-user time zone: refactor tests first.

chrome/browser/chromeos/file_manager/path_util_unittest.cc

Index: chrome/browser/chromeos/file_manager/path_util_unittest.cc
diff --git a/chrome/browser/chromeos/file_manager/path_util_unittest.cc b/chrome/browser/chromeos/file_manager/path_util_unittest.cc
index f7ad12162f5a8ee9a46959d87fc694221b4a1724..351f45091d5091e999e8f00c64a9fa68b42351eb 100644
--- a/chrome/browser/chromeos/file_manager/path_util_unittest.cc
+++ b/chrome/browser/chromeos/file_manager/path_util_unittest.cc
@@ -5,9 +5,11 @@
 #include "chrome/browser/chromeos/file_manager/path_util.h"
 
 #include "base/files/file_path.h"
+#include "base/sys_info.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
+#include "chrome/browser/chromeos/scoped_set_running_on_chromeos_for_testing.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
@@ -20,9 +22,17 @@ namespace file_manager {
 namespace util {
 namespace {
 
+const char kLsbRelease[] =
+    "CHROMEOS_RELEASE_NAME=Chrome OS\n"
+    "CHROMEOS_RELEASE_VERSION=1.2.3.4\n";
+
 TEST(FileManagerPathUtilTest, MultiProfileDownloadsFolderMigration) {
   content::TestBrowserThreadBundle thread_bundle;
   TestingProfile profile;
+  // MigratePathFromOldFormat is explicitly disabled on Linux build.
+  // So we need to fake that this is real ChromeOS system.
+  chromeos::ScopedSetRunningOnChromeOSForTesting fake_release(kLsbRelease,
+                                                              base::Time());
 
   // This looks like "/home/chronos/u-hash/Downloads" in the production
   // environment.