Add next_version_mini_installer target.

chrome/installer/mini_installer/generate_next_version_mini_installer.py

+#!/usr/bin/env python
+# 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.
+
+"""Generates a mini_installer with a higher version than an existing one."""
+
+import optparse
+import subprocess
+import sys
+
+
+def main():
+  parser = optparse.OptionParser()
+  parser.add_option('--out', help='Path to the generated mini_installer.')
+  options, args = parser.parse_args()
+  assert not args
+
+  return subprocess.call([
+      'alternate_version_generator.exe',
+      '--force',
+      '--out=' + options.out,
+      ])
+
+
+if '__main__' == __name__:
+  sys.exit(main())