Switch to direct use of OwnerSettingsServiceChromeOS::Set() in tests.

chrome/browser/chromeos/policy/device_local_account.h

Index: chrome/browser/chromeos/policy/device_local_account.h
diff --git a/chrome/browser/chromeos/policy/device_local_account.h b/chrome/browser/chromeos/policy/device_local_account.h
index 69a74806880ab400c103c025b3ac12ce7701ad6a..88271192ab4c6c2393bbc7c51ccaa36ddcae60d3 100644
--- a/chrome/browser/chromeos/policy/device_local_account.h
+++ b/chrome/browser/chromeos/policy/device_local_account.h
@@ -10,6 +10,7 @@
 
 namespace chromeos {
 class CrosSettings;
+class OwnerSettingsServiceChromeOS;
 }
 
 namespace policy {
@@ -64,12 +65,11 @@ std::string GenerateDeviceLocalAccountUserId(const std::string& account_id,
 bool IsDeviceLocalAccountUser(const std::string& user_id,
                               DeviceLocalAccount::Type* type);
 
-// Stores a list of device-local accounts in |cros_settings|. The accounts are
-// stored as a list of dictionaries with each dictionary containing the
-// information about one |DeviceLocalAccount|.
-void SetDeviceLocalAccounts(
-    chromeos::CrosSettings* cros_settings,
-    const std::vector<DeviceLocalAccount>& accounts);
+// Stores a list of device-local accounts in |service|. The accounts are stored
+// as a list of dictionaries with each dictionary containing the information
+// about one |DeviceLocalAccount|.
+void SetDeviceLocalAccounts(chromeos::OwnerSettingsServiceChromeOS* service,
+                            const std::vector<DeviceLocalAccount>& accounts);
 
 // Retrieves a list of device-local accounts from |cros_settings|.
 std::vector<DeviceLocalAccount> GetDeviceLocalAccounts(