Generate, merge, and embed manifest when doing split_link

tools/win/split_link/install_split_link.py

 # Copyright (c) 2013 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.
 
 import _winreg
 import os
 import shutil
 import subprocess
 import sys
 
@@ skipping 26 matching lines @@
   to be turned into a string in the target C program."""
   path = '"' + path + '"'
   return path.replace('\\', '\\\\').replace('"', '\\"')
 
 
 def main():
   # Switch to our own dir.
   os.chdir(BASE_DIR)
 
   link = FindInPath('link.exe')
-  if not link:
-    print("Couldn't find link.exe in PATH. Must run from Administrator "
-          "Visual Studio Command Prompt.")
+  mt = FindInPath('mt.exe')
+  if not link or not mt:
+    print("Couldn't find link.exe or mt.exe in PATH. "
+          "Must run from Administrator Visual Studio Command Prompt.")
     return 1
 
   link_backup = os.path.join(os.path.split(link)[0], 'link.exe.split_link.exe')
 
   # Don't re-backup link.exe, so only copy link.exe to backup if it's
   # not there already.
   if not os.path.exists(link_backup):
     try:
       print 'Saving original link.exe...'
       shutil.copyfile(link, link_backup)
@@ skipping 16 matching lines @@
                             python, script_path))
 
   # Copy shim into place.
   print 'Copying split_link.exe over link.exe...'
   try:
     shutil.copyfile('split_link.exe', link)
     _winreg.SetValue(_winreg.HKEY_CURRENT_USER,
                      'Software\\Chromium\\split_link_installed',
                      _winreg.REG_SZ,
                      link_backup)
+    _winreg.SetValue(_winreg.HKEY_CURRENT_USER,
+                     'Software\\Chromium\\split_link_mt_path',
+                     _winreg.REG_SZ,
+                     mt)
   except IOError:
     print("Wasn't able to copy split_link.exe over %s. "
           "Not running with Administrator privileges?" % link)
     return 1
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())