Revert of Return Windows error code when create-process fails.

chrome/installer/mini_installer/configuration.h

 // Copyright (c) 2012 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_INSTALLER_MINI_INSTALLER_CONFIGURATION_H_
 #define CHROME_INSTALLER_MINI_INSTALLER_CONFIGURATION_H_
 
 #include <windows.h>
 
-#include "chrome/installer/mini_installer/mini_string.h"
-
 namespace mini_installer {
 
 // A simple container of the mini_installer's configuration, as dictated by the
 // command line used to invoke it.
 class Configuration {
  public:
   enum Operation {
     INSTALL_PRODUCT,
     CLEANUP,
   };
@@ skipping 46 matching lines @@
   const wchar_t* chrome_app_guid_;
   const wchar_t* command_line_;
   int argument_count_;
   Operation operation_;
   bool has_chrome_;
   bool has_chrome_frame_;
   bool is_multi_install_;
   bool is_system_level_;
   const wchar_t* previous_version_;
 
- protected:
-  typedef StackString<128> ValueString;
-
-  // Virtual for testing.
-  virtual bool ReadClientStateRegistryValue(
-      const HKEY root_key, const wchar_t* app_guid,
-      LONG* retval, ValueString& value);
-
  private:
   Configuration(const Configuration&);
   Configuration& operator=(const Configuration&);
-
-  void SetChromeAppGuid();
 };
 
 }  // namespace mini_installer
 
 #endif  // CHROME_INSTALLER_MINI_INSTALLER_CONFIGURATION_H_