Initialize and reset V4LocalDBManager. Instantiate V4Stores.

components/safe_browsing_db/v4_store.cc

+// Copyright 2016 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/safe_browsing_db/v4_store.h"
+
+namespace safe_browsing {
+
+V4Store::V4Store(const scoped_refptr<base::SequencedTaskRunner>& task_runner,
+                 const base::FilePath& store_path) {}
+
+V4Store::~V4Store() {}
+
+bool V4Store::Reset() {
+  // TODO(vakh): Implement skeleton.
+  return true;
+}
+
+}  // namespace safe_browsing