Revert of Skeleton of the overall design for the database for Pver4

components/safe_browsing_db/v4_database.h

Index: components/safe_browsing_db/v4_database.h
diff --git a/components/safe_browsing_db/v4_database.h b/components/safe_browsing_db/v4_database.h
deleted file mode 100644
index 509939e68be6366928a21ca4071958d50fb574b7..0000000000000000000000000000000000000000
--- a/components/safe_browsing_db/v4_database.h
+++ /dev/null
@@ -1,79 +0,0 @@
-// 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.
-
-#ifndef COMPONENTS_SAFE_BROWSING_DB_V4_DATABASE_H_
-#define COMPONENTS_SAFE_BROWSING_DB_V4_DATABASE_H_
-
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/sequenced_task_runner.h"
-#include "components/safe_browsing_db/v4_protocol_manager_util.h"
-#include "components/safe_browsing_db/v4_store.h"
-
-namespace safe_browsing {
-
-class V4Database;
-
-typedef const base::hash_map<UpdateListIdentifier,
-                             const base::FilePath::CharType>
-    ListInfoMap;
-
-typedef std::unique_ptr<
-    base::hash_map<UpdateListIdentifier, std::unique_ptr<V4Store>>>
-    StoreMap;
-
-// Factory for creating V4Database. Tests implement this factory to create fake
-// databases for testing.
-class V4DatabaseFactory {
- public:
-  virtual ~V4DatabaseFactory() {}
-  virtual V4Database* CreateV4Database(
-      const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
-      const base::FilePath& base_path,
-      ListInfoMap list_info_map) = 0;
-};
-
-// The on-disk databases are shared among all profiles, as it doesn't contain
-// user-specific data. This object is not thread-safe, i.e. all its methods
-// should be used on the same thread that it was created on, unless specified
-// otherwise.
-// The hash-prefixes of each type are managed by a V4Store (including saving to
-// and reading from disk).
-// The V4Database serves as a single place to manage all the V4Stores.
-class V4Database {
- public:
-  // Factory method for obtaining a V4Database implementation.
-  // It is not thread safe.
-  // The availability of each list is controlled by the one flag on this
-  // method.
-  static V4Database* Create(
-      const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
-      const base::FilePath& base_path,
-      ListInfoMap list_info_map);
-
-  V4Database(
-     const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
-     StoreMap store_map);
-  virtual ~V4Database();
-
-  // Deletes the current database and creates a new one.
-  virtual bool ResetDatabase();
-
-  // Makes the passed |factory| the factory used to instantiate
-  // a V4Database. Only for tests.
-  static void RegisterFactoryForTest(V4DatabaseFactory* factory) {
-    factory_ = factory;
-  }
-
- private:
-  // The factory that controls the creation of V4Database objects.
-  // This is used *only* by tests.
-  static V4DatabaseFactory* factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(V4Database);
-};
-
-}  // namespace safe_browsing
-
-#endif  // COMPONENTS_SAFE_BROWSING_DB_V4_DATABASE_H_