Separate version env variable for different distributions.

chrome/installer/util/chrome_frame_distribution.h

 // 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 extends the browser distribution with a specific implementation
 // for Chrome Frame.
 
 #ifndef CHROME_INSTALLER_UTIL_CHROME_FRAME_DISTRIBUTION_H_
 #define CHROME_INSTALLER_UTIL_CHROME_FRAME_DISTRIBUTION_H_
 
@@ skipping 25 matching lines @@
   virtual std::wstring GetStateMediumKey();
 
   virtual std::wstring GetStatsServerURL();
 
   virtual std::wstring GetUninstallLinkName();
 
   virtual std::wstring GetUninstallRegPath();
 
   virtual std::wstring GetVersionKey();
 
+  virtual std::wstring GetEnvVersionKey();
+
   virtual bool CanSetAsDefault();
 
   // This is the point at which the Google Chrome installer removes the Google
   // Update ap value. We implement this simply to have the same behaviour re.
   // the ap value.
   virtual void UpdateDiffInstallStatus(bool system_install,
       bool incremental_install, installer_util::InstallStatus install_status);
 
  private:
   friend class BrowserDistribution;
 
   // Disallow construction from non-friends.
   ChromeFrameDistribution() {}
 
 };
 
 #endif  // CHROME_INSTALLER_UTIL_CHROME_FRAME_DISTRIBUTION_H_