Add infrastructure enabling tests of installer upgrade scenarios....

chrome/installer/test/alternate_version_generator.h

+// Copyright (c) 2010 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.
+//
+// This file exposes the public interface to the mini_installer re-versioner.
+
+#ifndef CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_
+#define CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_
+#pragma once
+
+#include <string>
+
+class FilePath;
+
+namespace upgrade_test {
+
+// Generates an alternate mini_installer.exe using the one indicated by
+// |original_installer_path|, giving the new one a higher version than the
+// original and placing it in |target_path|.  Any previous file at |target_path|
+// is clobbered.  Returns true on success.
+bool GenerateNextVersion(const FilePath& original_installer_path,
+                         const FilePath& target_path);
+
+}  // namespace upgrade_test
+
+#endif  // CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_