Installer support for Windows 10 inactive user toast.

chrome/installer/setup/setup_constants.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/installer/setup/setup_constants.h"
 
 namespace installer {
 
 // Elements that make up install paths.
 const wchar_t kChromeArchive[] = L"chrome.7z";
@@ skipping 14 matching lines @@
 // seconds.  This is used when changing the DisplayVersion registry value
 // only after some time has passed, called by the MSI installer.
 const char kDelay[] = "delay";
 
 // Set the MSI-managed DisplayVersion in the registry to match Chrome's real
 // version number. The parameter to this option specifies the product-id in
 // the registry under HKLM.
 const char kSetDisplayVersionProduct[] = "set-display-version-product";
 const char kSetDisplayVersionValue[] = "set-display-version-value";
 
+// Run setup.exe to conduct a post-update experiment.
+const char kUserExperiment[] = "user-experiment";
+
 }  // namespace switches
 
 }  // namespace installer