Add a Model to the download component.

components/download/internal/test/entry_utils.cc

+// 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 <algorithm>
+
+#include "components/download/internal/test/entry_utils.h"
+
+namespace download {
+namespace test {
+
+bool SuperficialEntryCompare(const Entry* const& expected,
+                             const Entry* const& actual) {
+  if (expected == nullptr || actual == nullptr)
+    return expected == actual;
+
+  return expected->client == actual->client && expected->guid == actual->guid &&
+         expected->state == actual->state;
+}
+
+bool SuperficialEntryListCompare(const std::vector<Entry*>& expected,
+                                 const std::vector<Entry*>& actual) {
+  return std::is_permutation(actual.cbegin(), actual.cend(), expected.cbegin(),
+                             SuperficialEntryCompare);
+}
+
+Entry BuildEntry(DownloadClient client, const std::string& guid) {
+  Entry entry;
+  entry.client = client;
+  entry.guid = guid;
+  return entry;
+}
+
+}  // namespace test
+}  // namespace download