Detect new instance of the browser when running in the background in persiste...

chrome/app/chrome_exe_main_gtk.cc

Index: chrome/app/chrome_exe_main_gtk.cc
===================================================================
--- chrome/app/chrome_exe_main_gtk.cc	(revision 45984)
+++ chrome/app/chrome_exe_main_gtk.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include "base/at_exit.h"
 #include "base/process_util.h"
+#include "chrome/browser/first_run.h"
 
 // The entry point for all invocations of Chromium, browser and renderer. On
 // windows, this does nothing but load chrome.dll and invoke its entry point in
@@ -44,5 +45,11 @@
   // keep it.
   // base::AtExitManager exit_manager;
 
-  return ChromeMain(argc, argv);
+  int return_code = ChromeMain(argc, argv);
+
+  // Launch a new instance if we're shutting down because we detected an
+  // upgrade in the persistent mode.
+  Upgrade::RelaunchChromeBrowserWithNewCommandLineIfNeeded();
+
+  return return_code;
 }