Clarify the use of --register-chrome-browser-suffix which triggers |unique_suffix| in ShellUtil::Re…

chrome/installer/util/util_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/util/util_constants.h"
 
 namespace installer {
 
 namespace switches {
 
@@ skipping 89 matching lines @@
 
 // Useful only when used with --update-setup-exe, otherwise ignored. It
 // specifies the full path where updated setup.exe will be stored.
 const char kNewSetupExe[] = "new-setup-exe";
 
 // Register Chrome as a valid browser on the current sytem. This option
 // requires that setup.exe is running as admin. If this option is specified,
 // options kInstallArchive and kUninstall are ignored.
 const char kRegisterChromeBrowser[] = "register-chrome-browser";
 
-const char kRegisterChromeBrowserSuffix[] =
-    "register-chrome-browser-suffix";
+// Used by the installer to forward the registration suffix of the
+// (un)installation in progress when launching an elevated setup.exe to finish
+// registration work.
+const char kRegisterChromeBrowserSuffix[] = "register-chrome-browser-suffix";
 
 // Switch to allow an extra URL protocol to be registered. This option is used
 // in conjunction with kRegisterChromeBrowser to specify an extra protocol
 // in addition to the standard set of protocols.
 const char kRegisterURLProtocol[] = "register-url-protocol";
 
 // Renames chrome.exe to old_chrome.exe and renames new_chrome.exe to chrome.exe
 // to support in-use updates. Also deletes opv key.
 const char kRenameChromeExe[] = "rename-chrome-exe";
 
@@ skipping 83 matching lines @@
 const wchar_t kOptionReadyMode[] = L"ready-mode";
 
 // Chrome channel display names.
 const wchar_t kChromeChannelUnknown[] = L"unknown";
 const wchar_t kChromeChannelCanary[] = L"canary";
 const wchar_t kChromeChannelDev[] = L"dev";
 const wchar_t kChromeChannelBeta[] = L"beta";
 const wchar_t kChromeChannelStable[] = L"";
 
 }  // namespace installer