Fix various grit python paths.

chromecast/tools/build/chromecast_repack_locales.py

 #!/usr/bin/env python
 # Copyright 2014 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 repack paks for a list of locales.
 
 Gyp doesn't have any built-in looping capability, so this just provides a way to
 loop over a list of locales when repacking pak files, thus avoiding a
 proliferation of mostly duplicate, cut-n-paste gyp actions.
 """
 
 import optparse
 import os
 import sys
 
-sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', '..',
-                             'tools', 'grit'))
+# Prepend the grit module from the source tree so it takes precedence over other
+# grit versions that might present in the search path.
+sys.path.insert(1, os.path.join(os.path.dirname(__file__), '..', '..', '..',
+                                'tools', 'grit'))
 from grit.format import data_pack
 
 # Some build paths defined by gyp.
 GRIT_DIR = None
 INT_DIR = None
 CHROMECAST_BRANDING = None
 
 class Usage(Exception):
   def __init__(self, msg):
     self.msg = msg
@@ skipping 98 matching lines @@
 
   if print_outputs:
     return list_outputs(locales)
 
   return repack_locales(locales)
 
 if __name__ == '__main__':
   results = DoMain(sys.argv[1:])
   if results:
     print results