Match version of idl_parser and WebCore so go.sh can be run from a Dart only enlistment.

tools/dom/scripts/dartdomgenerator.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This is the entry point to create Dart APIs from the IDL database."""
 
 import css_code_generator
 import os
 import sys
@@ skipping 11 matching lines @@
 third_party_dir = os.path.join(dart_dir, 'third_party')
 
 ply_dir = os.path.join(third_party_dir, 'ply')
 # If ply directory found then we're a Dart enlistment; third_party location
 # is dart-git/dart/third_party
 if not os.path.exists(ply_dir):
   # For Dartium (ply directory is dartium-git/src/third_party/ply) third_party
   # location is dartium-git/src/third_party 
   third_party_dir = os.path.join(dart_dir, '..', 'third_party')
   assert(os.path.exists(third_party_dir))
+else:
+  # It's Dart we need to make sure that tools in injected in our search path
+  # because this is where idl_parser is located for a Dart enlistment.  Dartium
+  # can firgure out the tools directory because of the location of where the
+  # scripts blink scripts are located.
+  tools_dir = os.path.join(dart_dir, 'tools')
+  sys.path.insert(1, tools_dir)
+
 sys.path.insert(1, third_party_dir)
 
 sys.path.insert(1, os.path.join(dart_dir, 'tools/dom/scripts'))
 
 import dartgenerator
 import database
 import fremontcutbuilder
 import logging
 import monitored
 import multiemitter
@@ skipping 286 matching lines @@
         os.path.join('..', '..', '..', 'sdk', 'lib', '_blink', 'dartium'))
 
   print '\nGenerating single file %s seconds' % round(time.time() - file_generation_start_time, 2)
 
   end_time = time.time()
 
   print '\nDone (dartdomgenerator) %s seconds' % round(end_time - start_time, 2)
 
 if __name__ == '__main__':
   sys.exit(main())