Windows install_static refactor.

chrome/install_static/google_chrome_install_modes.h

+// 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.
+
+// Brand-specific types and constants for Google Chrome.
+
+#ifndef CHROME_INSTALL_STATIC_GOOGLE_CHROME_INSTALL_MODES_H_
+#define CHROME_INSTALL_STATIC_GOOGLE_CHROME_INSTALL_MODES_H_
+
+namespace install_static {
+
+enum : bool {
+  kUseGoogleUpdateIntegration = true,
+};
+
+enum InstallConstantIndex {
+  STABLE_INDEX,
+  CANARY_INDEX,
+  NUM_INSTALL_MODES,
+};
+
+}  // namespace install_static
+
+#endif  // CHROME_INSTALL_STATIC_GOOGLE_CHROME_INSTALL_MODES_H_