import android.content.SyncStatusObserver;
import android.os.StrictMode;
-import com.google.common.annotations.VisibleForTesting;
-
import org.chromium.base.ObserverList;
+import org.chromium.base.VisibleForTesting;
import org.chromium.sync.signin.AccountManagerHelper;
import org.chromium.sync.signin.ChromeSigninController;