Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/generators/idl_c_proto.py

 #!/usr/bin/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.
 
 """ Generator for C style prototypes and definitions """
 
 import glob
 import os
@@ skipping 480 matching lines @@
     out += '%s\n};\n' % '\n'.join(members)
     return out
 
 
   def DefineStruct(self, node, releases, prefix='', comment=False):
     __pychecker__ = 'unusednames=comment,prefix'
     self.LogEnter('DefineStruct %s' % node)
     out = ''
     build_list = node.GetUniqueReleases(releases)
 
-    # Build the most recent one with comments
-    out = self.DefineStructInternals(node, build_list[-1],
-                                     include_version=False, comment=True)
+    if node.IsA('Interface'):
+      # Build the most recent one versioned, with comments
+      out = self.DefineStructInternals(node, build_list[-1],
+                                       include_version=True, comment=True)
+
+      # Define an unversioned typedef for the most recent version
+      out += '\ntypedef struct %s %s;\n' % (
+          self.GetStructName(node, build_list[-1], include_version=True),
+          self.GetStructName(node, build_list[-1], include_version=False))
+    else:
+      # Build the most recent one versioned, with comments
+      out = self.DefineStructInternals(node, build_list[-1],
+                                       include_version=False, comment=True)
+
 
     # Build the rest without comments and with the version number appended
     for rel in build_list[0:-1]:
       out += '\n' + self.DefineStructInternals(node, rel,
                                                include_version=True,
                                                comment=False)
 
     self.LogExit('Exit DefineStruct')
     return out
 
@@ skipping 123 matching lines @@
     if f.GetProperty('ERRORS') > 0:
       print 'Skipping %s' % f.GetName()
       continue
     print DefineDepends(node)
     for node in f.GetChildren()[2:]:
       print Define(node, comment=True, prefix='tst_')
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv[1:]))