Make gyp build get idl files from only one location.

plugin/idl/get_idl_files.py

+#!/usr/bin/env python
+# Copyright (c) 2009 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.
+
+"""Helper script to generate file lists for idl.gyp."""
+
+import os.path
+import sys
+import types
+
+
+# Read in the manifest files (which are just really simple python files),
+# and scrape out the file lists.
+def main(argv):
+  idl_list_filename = os.path.join('..', 'idl_list.manifest')
+  files = eval(open(idl_list_filename, "r").read())
+  files = [os.path.basename(f) for f in files]
+  files.sort()
+  for file in files:
+    # gyp wants paths with slashes, not backslashes.
+    print file.replace("\\", "/")
+
+
+if __name__ == "__main__":
+  main(sys.argv[1:])