ClangPchManager: Add BuildDependenciesProvider

It is still unfinished but I want to add other changes first.

Change-Id: Ife7ac56576f85d800633ea1e8f1c3f4f16486d5f
Task-number: QTCREATORBUG-21377
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangpchmanagerbackend/source/builddependenciesstorageinterface.h

@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <builddependency.h>
+#include <filepathid.h>
+#include <filestatus.h>
+#include <sourcedependency.h>
+#include <usedmacro.h>
+
+namespace ClangBackEnd {
+
+class BuildDependenciesStorageInterface
+{
+public:
+    BuildDependenciesStorageInterface() = default;
+    BuildDependenciesStorageInterface(const BuildDependenciesStorageInterface &) = delete;
+    BuildDependenciesStorageInterface &operator=(const BuildDependenciesStorageInterface &) = delete;
+
+    virtual void updateSources(const SourceEntries &sourceIds) = 0;
+    virtual void insertOrUpdateUsedMacros(const UsedMacros &usedMacros) = 0;
+    virtual void insertFileStatuses(const FileStatuses &fileStatuses) = 0;
+    virtual void insertOrUpdateSourceDependencies(const SourceDependencies &sourceDependencies) = 0;
+    virtual long long fetchLowestLastModifiedTime(FilePathId sourceId) const = 0;
+    virtual SourceEntries fetchDependSources(FilePathId sourceId) const = 0;
+    virtual UsedMacros fetchUsedMacros(FilePathId sourceId) const = 0;
+
+protected:
+    ~BuildDependenciesStorageInterface() = default;
+};
+
+} // namespace ClangBackEnd