Return Windows error code when create-process fails.

chrome/installer/mini_installer/mini_installer_constants.cc

 // Copyright 2014 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/mini_installer/mini_installer_constants.h"
 
 namespace mini_installer {
 
 // Various filenames and prefixes.
 // The target name of the installer extracted from resources.
@@ skipping 28 matching lines @@
 const wchar_t kLZCResourceType[] = L"BL";
 // 7zip archive.
 const wchar_t kLZMAResourceType[] = L"B7";
 
 // Registry value names.
 // The name of an app's Client State registry value that holds its tag/channel.
 const wchar_t kApRegistryValue[] = L"ap";
 // The name of the value in kCleanupRegistryKey that tells the installer not to
 // delete extracted files.
 const wchar_t kCleanupRegistryValue[] = L"ChromeInstallerCleanup";
+// These values provide installer result codes to Omaha.
+const wchar_t kInstallerErrorRegistryValue[] = L"InstallerError";
+const wchar_t kInstallerExtraCode1RegistryValue[] = L"InstallerExtraCode1";
+const wchar_t kInstallerResultRegistryValue[] = L"InstallerResult";
 // The name of an app's Client State registry value that holds the path to its
 // uninstaller.
 const wchar_t kUninstallRegistryValue[] = L"UninstallString";
 
 // Registry key paths.
 #if defined(GOOGLE_CHROME_BUILD)
 // The path to the key containing each app's Client State registry key.
 const wchar_t kClientStateKeyBase[] =
     L"Software\\Google\\Update\\ClientState\\";
 // The path to the key in which kCleanupRegistryValue is found.
 const wchar_t kCleanupRegistryKey[] =
     L"Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\Google Chrome";
 #else
 // The path to the key containing each app's Client State registry key.
 // No trailing slash on this one because the app's GUID is not appended.
 const wchar_t kClientStateKeyBase[] = L"Software\\Chromium";
 // The path to the key in which kCleanupRegistryValue is found.
 const wchar_t kCleanupRegistryKey[] = L"Software\\Chromium";
 #endif
 
 // One gigabyte is the biggest resource size that it can handle.
 const size_t kMaxResourceSize = 1024*1024*1024;
 
 }  // namespace mini_installer