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

chrome/installer/mini_installer/regkey.h

Index: chrome/installer/mini_installer/regkey.h
diff --git a/chrome/installer/mini_installer/regkey.h b/chrome/installer/mini_installer/regkey.h
deleted file mode 100644
index 288f1a01427868f08e6e5a346e8c4ab1de9c057c..0000000000000000000000000000000000000000
--- a/chrome/installer/mini_installer/regkey.h
+++ /dev/null
@@ -1,65 +0,0 @@
-// 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_REGKEY_H_
-#define CHROME_INSTALLER_MINI_INSTALLER_REGKEY_H_
-
-#include <windows.h>
-
-namespace mini_installer {
-
-// A helper class used to manipulate the Windows registry.  Typically, members
-// return Windows last-error codes a la Win32 registry API.
-class RegKey {
- public:
-  RegKey() : key_(NULL) { }
-  ~RegKey() { Close(); }
-
-  // Opens the key named |sub_key| with given |access| rights.  Returns
-  // ERROR_SUCCESS or some other error.
-  LONG Open(HKEY key, const wchar_t* sub_key, REGSAM access);
-
-  // Returns true if a key is open.
-  bool is_valid() const { return key_ != NULL; }
-
-  // Read a value from the registry into the memory indicated by |value|
-  // (of |value_size| wchar_t units).  Returns ERROR_SUCCESS,
-  // ERROR_FILE_NOT_FOUND, ERROR_MORE_DATA, or some other error.  |value| is
-  // guaranteed to be null-terminated on success.
-  LONG ReadSZValue(const wchar_t* value_name,
-                   wchar_t* value,
-                   size_t value_size) const;
-  LONG ReadDWValue(const wchar_t* value_name, DWORD* value) const;
-
-  // Write a value to the registry.  SZ |value| must be null-terminated.
-  // Returns ERROR_SUCCESS or an error code.
-  LONG WriteSZValue(const wchar_t* value_name, const wchar_t* value);
-  LONG WriteDWValue(const wchar_t* value_name, DWORD value);
-
-  // Closes the key if it was open.
-  void Close();
-
-  // Helper function to read a value from registry.  Returns true if value
-  // is read successfully and stored in parameter value. Returns false
-  // otherwise. |size| is measured in wchar_t units.
-  static bool ReadSZValue(HKEY root_key, const wchar_t *sub_key,
-                          const wchar_t *value_name, wchar_t *value,
-                          size_t value_size);
-
- private:
-  RegKey(const RegKey&);
-  RegKey& operator=(const RegKey&);
-
-  HKEY key_;
-};  // class RegKey
-
-
-// Helper function to get the RegKey associated with the "client state" of
-// the given |app_guid|.
-bool OpenClientStateKey(HKEY root_key, const wchar_t* app_guid,
-                        REGSAM access, RegKey* key);
-
-}  // namespace mini_installer
-
-#endif  // CHROME_INSTALLER_MINI_INSTALLER_REGKEY_H_