mini_installer code cleanups (no functional changes).

chrome/installer/mini_installer.gypi

 # 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.
 {
   'dependencies': [
     '<@(chrome_dll_project)',
     '../chrome.gyp:chrome',
     '../chrome.gyp:chrome_nacl_win64',
     '../chrome.gyp:default_extensions',
     '../chrome.gyp:setup',
   ],
   'include_dirs': [
     '../..',
     '<(INTERMEDIATE_DIR)',
     '<(SHARED_INTERMEDIATE_DIR)/chrome',
   ],
   'sources': [
     'mini_installer/appid.h',
     'mini_installer/chrome.release',
     'mini_installer/chrome_appid.cc',
     'mini_installer/configuration.cc',
     'mini_installer/configuration.h',
     'mini_installer/decompress.cc',
     'mini_installer/decompress.h',
+    'mini_installer/exit_code.h',
     'mini_installer/mini_installer.cc',
-    'mini_installer/mini_installer.h',
     'mini_installer/mini_installer.ico',
     'mini_installer/mini_installer.rc',
+    'mini_installer/mini_installer_constants.cc',
+    'mini_installer/mini_installer_constants.h',
     'mini_installer/mini_installer_exe_version.rc.version',
     'mini_installer/mini_installer_resource.h',
     'mini_installer/mini_string.cc',
     'mini_installer/mini_string.h',
     'mini_installer/pe_resource.cc',
     'mini_installer/pe_resource.h',
     '<(INTERMEDIATE_DIR)/packed_files.rc',
   ],
   # Disable precompiled headers for this project, to avoid
   # linker errors when building with VS 2008.
@@ skipping 189 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }