Fix seed_steps for generator annotation recipes.

scripts/slave/annotated_run.py

Index: scripts/slave/annotated_run.py
diff --git a/scripts/slave/annotated_run.py b/scripts/slave/annotated_run.py
index a6aae072b14bf244c60f94720d8b6d51605863f9..c9392c01d11dce026cd4182a5d3ce40bbd6a7f4a 100755
--- a/scripts/slave/annotated_run.py
+++ b/scripts/slave/annotated_run.py
@@ -116,6 +116,8 @@ def fixup_seed_steps(sequence):
   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):
@@ -290,7 +292,10 @@ def run_steps(stream, build_properties, factory_properties, test_data=None):
     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'))