Add a self-destruct mechanism to user-level Chrome Frame when it detects that system-level Chrome...

chrome/browser/browser_main.cc

Index: chrome/browser/browser_main.cc
===================================================================
--- chrome/browser/browser_main.cc	(revision 85906)
+++ chrome/browser/browser_main.cc	(working copy)
@@ -1603,7 +1603,9 @@
   // Note this check should only happen here, after all the checks above
   // (uninstall, resource bundle initialization, other chrome browser
   // processes etc).
-  if (CheckMachineLevelInstall())
+  // Do not allow this to occur for Chrome Frame user-to-system handoffs.
+  if (!parsed_command_line.HasSwitch(switches::kChromeFrame) &&
+      CheckMachineLevelInstall())
     return ResultCodes::MACHINE_LEVEL_INSTALL_EXISTS;
 
   // Create the TranslateManager singleton.