Fix seed_steps for generator annotation recipes.

scripts/slave/annotated_run.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """Entry point for fully-annotated builds.
 
 This script is part of the effort to move all builds to annotator-based
 systems. Any builder configured to use the AnnotatorFactory.BaseFactory()
 found in scripts/master/factory/annotator_factory.py executes a single
@@ skipping 98 matching lines @@
         continue
     ret.append(item)
   return ret
 
 
 def fixup_seed_steps(sequence):
   """Takes a sequence of step dict's and adds seed_steps to the first entry
   if appropriate."""
   if sequence and 'seed_steps' not in sequence[0]:
     sequence[0]['seed_steps'] = [x['name'] for x in sequence]
+    for other in sequence[1:]:
+      other['seed_steps'] = []
 
 
 def ensure_sequence_of_steps(step_or_steps):
   """Generates one or more fixed steps, given a step or a sequence of steps."""
   if isinstance(step_or_steps, collections.Sequence):
     step_seq = step_or_steps
     fixup_seed_steps(step_seq)
     for s in step_seq:
       yield s
   else:
@@ skipping 154 matching lines @@
         new_cmd.append(item)
     step['cmd'] = new_cmd
     if 'cwd' in step:
       [new_cwd] = expand_root_placeholder(root, [step['cwd']])
       step['cwd'] = new_cwd
 
     json_data = step.pop('static_json_data', {})
     assert not(json_data and json_output_name), (
       "Cannot have both static_json_data as well as dynamic json_data")
     if test_data is None:
-      failed, [retcode] = annotator.run_steps([step], failed)
+      # Manually mangae seed_steps because annotator.py doesn't have enough
+      # context
+      seed_steps = step.pop('seed_steps')
+      failed, [retcode] = annotator.run_steps([step], failed, seed_steps)
       if json_output_name:
         try:
           json_data = json.load(os.fdopen(json_output_fd, 'r'))
         except ValueError:
           pass
     else:
       retcode, potential_json_data = test_data.pop(step['name'], (0, {}))
       json_data = json_data or potential_json_data
       failed = failed or retcode != 0
 
@@ skipping 24 matching lines @@
       s.step_text('gclient sync failed!')
       s.step_warnings()
     os.environ['RUN_SLAVE_UPDATED_SCRIPTS'] = '1'
     return True
 
 
 if __name__ == '__main__':
   if UpdateScripts():
     os.execv(sys.executable, [sys.executable] + sys.argv)
   sys.exit(main(sys.argv))