Fix many* python scripts in src/

remoting/webapp/verify-webapp.py

-#!/usr/bin/python
+#!/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.
 
 """Verifies that a given messages.json file defines all the strings used by the
 a given set of files. For file formats where it is not possible to infer which
 strings represent message identifiers, localized strings should be explicitly
 annotated with the string "i18n-content", for example:
 
   LocalizeString(/*i18n-content*/"PRODUCT_NAME");
@@ skipping 59 matching lines @@
             (os.getcwd(), filename, i + 1, tag)
   if not matches:
     print '%s/%s:0: warning: No tags found' % (os.getcwd(), filename)
   f.close()
   return result
 
 
 def main():
   if len(sys.argv) < 4:
     print 'Usage: verify-webapp.py <touch> <messages> <message_users...>'
-    sys.exit(1)
+    return 1
 
   touch_file = sys.argv[1]
   messages = json.load(open(sys.argv[2], 'r'))
   exit_code = 0
   for f in sys.argv[3:]:
     if not CheckFileForUnknownTag(f, messages):
       exit_code = 1
 
   warnings = False
   for tag in messages:
     if tag not in all_tags:
       print ('%s/%s:0: warning: %s is defined but not used') % \
           (os.getcwd(), sys.argv[2], tag)
       warnings = True
   if warnings:
     print WARNING_MESSAGE
 
   if exit_code == 0:
     f = open(touch_file, 'a')
     f.close()
     os.utime(touch_file, None)
 
-  sys.exit(exit_code)
+  return exit_code
 
 
 if __name__ == '__main__':
-  main()
+  sys.exit(main())