Make PPAPI headers compilable with -Wstrict-prototypes

ppapi/generators/idl_c_proto.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """ Generator for C style prototypes and definitions """
 
 import glob
 import os
 import sys
@@ skipping 394 matching lines @@
       name = prefix + name + arrayspec
     if callspec is None:
       out = '%s %s' % (rtype, name)
     else:
       params = []
       for ptype, pname, parray, pspec in callspec:
         params.append(self.Compose(ptype, pname, parray, pspec, '', True,
                                    ptr_prefix='', include_name=True))
       if func_as_ptr:
         name = '(%s*%s)' % (ptr_prefix, name)
+      if not params:
+        params = ['void']
       out = '%s %s(%s)' % (rtype, name, ', '.join(params))
     self.LogExit('Exit Compose: %s' % out)
     return out
 
   #
   # GetSignature
   #
   # Returns the 'C' style signature of the object
   #  prefix - A prefix for the object's name
   #  func_as_ptr - Formats a function as a function pointer
@@ skipping 284 matching lines @@
     if f.GetProperty('ERRORS') > 0:
       print 'Skipping %s' % f.GetName()
       continue
     for node in f.GetChildren()[2:]:
       print cgen.Define(node, comment=True, prefix='tst_')
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv[1:]))