Added the logic and the test for the builder of the framework.

BUG=None
TEST=None

Change-Id: Ibf65d94c042b39f340ccaae7a9aaa16d390c8d50
Reviewed-on: https://gerrit-int.chromium.org/39864
Reviewed-by: Simon Que <sque@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Yuheng Long <yuhenglong@google.com>
Tested-by: Yuheng Long <yuhenglong@google.com>
diff --git a/bestflags/pipeline_process.py b/bestflags/pipeline_process.py
index 37f4a99..29d88f5 100644
--- a/bestflags/pipeline_process.py
+++ b/bestflags/pipeline_process.py
@@ -107,7 +107,7 @@
       else:
         # Let the workers do the actual work.
         work_pool.apply_async(self._worker, args=(task, self._work_queue,
-                                                   self._result_queue))
+                                                  self._result_queue))
         mycache.append(task_key)
 
     # Shutdown the workers pool and the helper process.