Add a Model to the download component.

components/download/internal/test/test_store.h

Index: components/download/internal/test/test_store.h
diff --git a/components/download/internal/test/test_store.h b/components/download/internal/test/test_store.h
new file mode 100644
index 0000000000000000000000000000000000000000..e64d8ba8355672ec7f6c9bb4e1c61d12c7fa163a
--- /dev/null
+++ b/components/download/internal/test/test_store.h
@@ -0,0 +1,68 @@
+// 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.
+
+#ifndef COMPONENTS_DOWNLOAD_INTERNAL_TEST_TEST_STORE_H_
+#define COMPONENTS_DOWNLOAD_INTERNAL_TEST_TEST_STORE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "components/download/internal/store.h"
+
+namespace download {
+
+struct Entry;
+
+namespace test {
+
+class TestStore : public Store {
+ public:
+  TestStore();
+  ~TestStore() override;
+
+  // Store implementation.
+  bool IsInitialized() override;
+  void Initialize(InitCallback callback) override;
+  void Destroy(StoreCallback callback) override;
+  void Update(const Entry& entry, StoreCallback callback) override;
+  void Remove(const std::string& guid, StoreCallback callback) override;
+
+  // Callback trigger methods.
+  void TriggerInit(bool success, std::unique_ptr<std::vector<Entry>> entries);
+  void TriggerDestroy(bool success);
+  void TriggerUpdate(bool success);
+  void TriggerRemove(bool success);
+
+  // Parameter access methods.
+  const Entry* LastUpdatedEntry() const;
+  std::string LastRemovedEntry() const;
+  bool init_called() const { return init_called_; }
+  bool destroy_called() const { return destroy_called_; }
+  const std::vector<Entry>& updated_entries() const { return updated_entries_; }
+  const std::vector<std::string>& removed_entries() const {
+    return removed_entries_;
+  }
+
+ private:
+  bool ready_;
+
+  bool init_called_;
+  bool destroy_called_;
+
+  std::vector<Entry> updated_entries_;
+  std::vector<std::string> removed_entries_;
+
+  InitCallback init_callback_;
+  StoreCallback destroy_callback_;
+  StoreCallback update_callback_;
+  StoreCallback remove_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestStore);
+};
+
+}  // namespace test
+}  // namespace download
+
+#endif  // COMPONENTS_DOWNLOAD_INTERNAL_TEST_TEST_STORE_H_