When changing Ready Mode state from within an IE process, use chrome_launcher...

chrome_frame/chrome_launcher_utils.h

Index: chrome_frame/chrome_launcher_utils.h
===================================================================
--- chrome_frame/chrome_launcher_utils.h	(revision 71126)
+++ chrome_frame/chrome_launcher_utils.h	(working copy)
@@ -23,6 +23,12 @@
 // returned command line.
 CommandLine* CreateLaunchCommandLine();
 
+// Creates a command line suitable for launching the specified command through
+// Google Update.
+//
+// You must delete the returned command line.
+CommandLine* CreateUpdateCommandLine(const std::wstring& update_command);
+
 // Returns the full path to the Chrome executable.
 FilePath GetChromeExecutablePath();