Track step nesting in StreamEngine.

recipe_modules/generator_script/api.py

Index: recipe_modules/generator_script/api.py
diff --git a/recipe_modules/generator_script/api.py b/recipe_modules/generator_script/api.py
index ad9f634922e28805ce9690ac596a648555a29f7e..86d08066278069bea636bf66d3e5cf1617433c4a 100644
--- a/recipe_modules/generator_script/api.py
+++ b/recipe_modules/generator_script/api.py
@@ -30,8 +30,7 @@ class GeneratorScriptApi(recipe_api.RecipeApi):
       infra_step: a bool which indicates that failures in this step are 'infra'
         failures and should abort with a purple coloration instead red.
 
-      step_nest_level: an integer which indicates that this step should appear
-        on the build status page with this indentation level.
+      nested: true if this step is nested.
 
       always_run: a bool which indicates that this step should run, even if
         some previous step failed.
@@ -90,7 +89,6 @@ class GeneratorScriptApi(recipe_api.RecipeApi):
       #TODO(martiniss) change this to use a regular step call
       step['ok_ret'] = set(step.pop('ok_ret', {0}))
       step['infra_step'] = bool(step.pop('infra_step', False))
-      step['step_nest_level'] = int(step.pop('step_nest_level', 0))

[dnj, 2016/08/15 17:33:53]

(This will be re-added in next PS, was oversight).

 
       if step.pop('always_run', False) or not failed_steps:
         try: