Fixing issue with early unset of version variable.

chrome/browser/lifetime/application_lifetime_win.cc

Index: chrome/browser/lifetime/application_lifetime_win.cc
diff --git a/chrome/browser/lifetime/application_lifetime_win.cc b/chrome/browser/lifetime/application_lifetime_win.cc
index c5ea8a2c87c49761d953131fe9c9b5ac92595a0b..9c5cbdeed41068bcb0159611c6925ec85d086c48 100644
--- a/chrome/browser/lifetime/application_lifetime_win.cc
+++ b/chrome/browser/lifetime/application_lifetime_win.cc
@@ -71,9 +71,7 @@ void ActivateDesktopHelper() {
   std::string version_str;
 
   // Get the version variable and remove it from the environment.
-  if (env->GetVar(chrome::kChromeVersionEnvVar, &version_str))
-    env->UnSetVar(chrome::kChromeVersionEnvVar);
-  else
+  if (!env->GetVar(chrome::kChromeVersionEnvVar, &version_str))
     version_str.clear();
 
   base::FilePath exe_path;