ninja win: Allow parent environment variables through when running actions

pylib/gyp/win_tool.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Utility functions for Windows builds.
 
 These functions are executed via gyp-win-tool when using the ninja generator.
 """
@@ skipping 260 matching lines @@
       if (not line.startswith('Microsoft (R) Windows (R) Resource Compiler') and
           not line.startswith('Copyright (C) Microsoft Corporation') and
           line):
         print line
     return popen.returncode
 
   def ExecActionWrapper(self, arch, rspfile, *dir):
     """Runs an action command line from a response file using the environment
     for |arch|. If |dir| is supplied, use that as the working directory."""
     env = self._GetEnv(arch)
+    # TODO(scottmg): This is a temporary hack to get some specific variables
+    # through to actions that are set after gyp-time. http://crbug.com/333738.
+    for k, v in os.environ.iteritems():
+      if k not in env:
+        env[k] = v
     args = open(rspfile).read()
     dir = dir[0] if dir else None
     return subprocess.call(args, shell=True, env=env, cwd=dir)
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))