Add a Model to the download component.

components/download/internal/download_service_impl_unittest.cc

Index: components/download/internal/download_service_impl_unittest.cc
diff --git a/components/download/internal/download_service_impl_unittest.cc b/components/download/internal/download_service_impl_unittest.cc
deleted file mode 100644
index e9557c70a8fe3d4f877bd1f0fda0ed93bee325bb..0000000000000000000000000000000000000000
--- a/components/download/internal/download_service_impl_unittest.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright 2017 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 "components/download/internal/download_service_impl.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-TEST(DownloadServiceImplTest, DummyTest) {
-  EXPECT_TRUE(true);
-}