Use InstallDetails in setup.

chrome/install_static/install_util.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.
 
 // This file contains helper functions which provide information about the
 // current version of Chrome. This includes channel information, version
 // information etc. This functionality is provided by using functions in
 // kernel32 and advapi32. No other dependencies are allowed in this file.
 
 #ifndef CHROME_INSTALL_STATIC_INSTALL_UTIL_H_
@@ skipping 160 matching lines @@
 std::wstring GetSwitchValueFromCommandLine(const std::wstring& command_line,
                                            const std::wstring& switch_name);
 
 // Ensures that the given |full_path| exists, and that the tail component is a
 // directory. If the directory does not already exist, it will be created.
 // Returns false if the final component exists but is not a directory, or on
 // failure to create a directory.
 bool RecursiveDirectoryCreate(const std::wstring& full_path);
 
 // Returns the unadorned channel name based on the channel strategy for the
-// install mode.
-std::wstring DetermineChannel(const InstallConstants& mode, bool system_level);
+// install mode. |from_binaries| forces the registry locations corresponding to
+// the now-deprecated multi-install binaries to be read, and is only for use by
+// the installer.
+std::wstring DetermineChannel(const InstallConstants& mode,
+                              bool system_level,
+                              bool from_binaries = false);
 
 // Caches the |ProcessType| of the current process.
 extern ProcessType g_process_type;
 
 }  // namespace install_static
 
 #endif  // CHROME_INSTALL_STATIC_INSTALL_UTIL_H_