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

chrome_frame/chrome_launcher_utils.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_FRAME_CHROME_LAUNCHER_UTILS_H_
 #define CHROME_FRAME_CHROME_LAUNCHER_UTILS_H_
 
 #include <string>
 
 class CommandLine;
 class FilePath;
 
 namespace chrome_launcher {
 
 // The base name of the chrome_launcher.exe file.
 extern const wchar_t kLauncherExeBaseName[];
 
 // Creates a command line suitable for launching Chrome.  You can add any
 // flags needed before launching.
 //
 // The command-line may use the Chrome executable directly, or use an in-between
 // process if needed for security/elevation purposes.  You must delete the
 // 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();
 
 }  // namespace chrome_launcher
 
 #endif  // CHROME_FRAME_CHROME_LAUNCHER_UTILS_H_