Separate version env variable for different distributions.

chrome/installer/util/google_chrome_distribution.cc

 // Copyright (c) 2009 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 defines specific implementation of BrowserDistribution class for
 // Google Chrome.
 
 #include "chrome/installer/util/google_chrome_distribution.h"
 
 #include <windows.h>
@@ skipping 461 matching lines @@
          L"Google Chrome";
 }
 
 std::wstring GoogleChromeDistribution::GetVersionKey() {
   std::wstring key(google_update::kRegPathClients);
   key.append(L"\\");
   key.append(product_guid());
   return key;
 }
 
+std::wstring GoogleChromeDistribution::GetEnvVersionKey() {
+  return L"CHROME_VERSION";
+}
+
 // This method checks if we need to change "ap" key in Google Update to try
 // full installer as fall back method in case incremental installer fails.
 // - If incremental installer fails we append a magic string ("-full"), if
 // it is not present already, so that Google Update server next time will send
 // full installer to update Chrome on the local machine
 // - If we are currently running full installer, we remove this magic
 // string (if it is present) regardless of whether installer failed or not.
 // There is no fall-back for full installer :)
 void GoogleChromeDistribution::UpdateDiffInstallStatus(bool system_install,
     bool incremental_install, installer_util::InstallStatus install_status) {
@@ skipping 141 matching lines @@
   GoogleUpdateSettings::SetClient(GetExperimentGroup(outcome, flavor));
   if (outcome != kToastExpUninstallGroup)
     return;
   // The user wants to uninstall. This is a best effort operation. Note that
   // we waited for chrome to exit so the uninstall would not detect chrome
   // running.
   base::LaunchApp(InstallUtil::GetChromeUninstallCmd(system_install),
                   false, false, NULL);
 }
 #endif