Add GetAnyChromeSxSPath.

chrome/installer/launcher_support/chrome_launcher_support.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/launcher_support/chrome_launcher_support.h"
 
 #include <windows.h>
 #include <tchar.h>
 
 #include "base/command_line.h"
@@ skipping 16 matching lines @@
 const wchar_t kGoogleRegClientStateKey[] =
     L"Software\\Google\\Update\\ClientState";
 const wchar_t kGoogleRegClientsKey[] = L"Software\\Google\\Update\\Clients";
 const wchar_t kRegVersionField[] = L"pv";
 
 // Copied from binaries_installer_internal.cc
 const wchar_t kAppHostAppId[] = L"{FDA71E6F-AC4C-4a00-8B70-9958A68906BF}";
 
 // Copied from chrome_appid.cc.
 const wchar_t kBinariesAppGuid[] = L"{4DC8B4CA-1BDA-483e-B5FA-D3C12E15B62D}";
+const wchar_t kSxSBrowserAppGuid[] = L"{4ea16ac7-fd5a-47c3-875b-dbf4a2008c20}";
 
 // Copied from google_chrome_distribution.cc.
 const wchar_t kBrowserAppGuid[] = L"{8A69D345-D564-463c-AFF1-A69D9E530F96}";
 
 // Copied from util_constants.cc.
 const wchar_t kChromeAppHostExe[] = L"app_host.exe";
 const char kChromeAppLauncher[] = "app-launcher";
 const wchar_t kChromeExe[] = L"chrome.exe";
+const char kChromeSxS[] = "chrome-sxs";
 const wchar_t kUninstallArgumentsField[] = L"UninstallArguments";
 const wchar_t kUninstallStringField[] = L"UninstallString";
 
 // Reads a string value from the specified product's "ClientState" registry key.
 // Returns true iff the value is present and successfully read.
 bool GetClientStateValue(InstallationLevel level,
                          const wchar_t* app_guid,
                          const wchar_t* value_name,
                          base::string16* value) {
   HKEY root_key = (level == USER_LEVEL_INSTALLATION) ?
@@ skipping 88 matching lines @@
     CommandLine uninstall_cmd = CommandLine::FromString(
         L"\"" + setup_exe.value() + L"\" " + uninstall_arguments);
 
     VLOG(1) << "Uninstalling legacy app launcher with command line: "
             << uninstall_cmd.GetCommandLineString();
     base::LaunchProcess(uninstall_cmd, base::LaunchOptions(), NULL);
   }
 }
 
 base::FilePath GetSetupExeForInstallationLevel(InstallationLevel level) {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(kChromeSxS))

[grt (UTC plus 2), 2014/03/17 21:26:51]

from what context do you expect to call this? do callers necessarily have
--chrome-sxs on their command line?

+    return GetSetupExeFromRegistry(level, kSxSBrowserAppGuid);
+
   // Look in the registry for Chrome Binaries first.
   base::FilePath setup_exe_path(
       GetSetupExeFromRegistry(level, kBinariesAppGuid));
   // If the above fails, look in the registry for Chrome next.
   if (setup_exe_path.empty())
     setup_exe_path = GetSetupExeFromRegistry(level, kBrowserAppGuid);
   // If we fail again, then setup_exe_path would be empty.
   return setup_exe_path;
 }
 
@@ skipping 45 matching lines @@
 bool IsAppLauncherPresent() {
   return GetAppLauncherInstallationState() != NOT_INSTALLED;
 }
 
 bool IsChromeBrowserPresent() {
   return IsProductInstalled(USER_LEVEL_INSTALLATION, kBrowserAppGuid) ||
       IsProductInstalled(SYSTEM_LEVEL_INSTALLATION, kBrowserAppGuid);
 }
 
 }  // namespace chrome_launcher_support