Fix python scripts in src/tools/

tools/site_compare/scrapers/firefox/firefox2.py

Index: tools/site_compare/scrapers/firefox/firefox2.py
diff --git a/tools/site_compare/scrapers/firefox/firefox2.py b/tools/site_compare/scrapers/firefox/firefox2.py
old mode 100644
new mode 100755
index fa0d6201200ef472941030d48dc1f10bd09afb36..2181f588f818b5fd4ab73d1da9ad1db8fe5f74fd
--- a/tools/site_compare/scrapers/firefox/firefox2.py
+++ b/tools/site_compare/scrapers/firefox/firefox2.py
@@ -1,5 +1,5 @@
-#!/usr/bin/python2.4
-# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+#!/usr/bin/env python
+# Copyright (c) 2011 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.
 
@@ -232,7 +232,7 @@ def Time(urls, size, timeout, **kwargs):
   return ret
 
 
-if __name__ == "__main__":
+def main():
   # We're being invoked rather than imported, so run some tests
   path = r"c:\sitecompare\scrapes\Firefox\2.0.0.6"
   windowing.PreparePath(path)
@@ -242,4 +242,8 @@ if __name__ == "__main__":
     ["http://www.microsoft.com", "http://www.google.com",
      "http://www.sun.com"],
     path, (1024, 768), (0, 0))
+  return 0
+
 
+if __name__ == "__main__":
+  sys.exit(main())