Move serving_dirs to UserStorySet, update user_story_runner.

tools/telemetry/telemetry/user_story/__init__.py

Index: tools/telemetry/telemetry/user_story/__init__.py
diff --git a/tools/telemetry/telemetry/user_story/__init__.py b/tools/telemetry/telemetry/user_story/__init__.py
index 3b6620ed98487b39e627d2d0315e2040b352aba8..68d9b565ffb243aa55f99b2dd3fd3d26c737d3bb 100644
--- a/tools/telemetry/telemetry/user_story/__init__.py
+++ b/tools/telemetry/telemetry/user_story/__init__.py
@@ -18,14 +18,16 @@ class UserStory(object):
 
   Args:
     shared_user_story_state_class: subclass of
-      telemetry.user_story.shared_user_story_state.SharedUserStoryState.
+        telemetry.user_story.shared_user_story_state.SharedUserStoryState.
     name: string name of this user story that can be used for identifying user
-      story in results output.
+        story in results output.
     labels: A list or set of string labels that are used for filtering. See
-      user_story.user_story_filter for more information.
+        user_story.user_story_filter for more information.
+    is_local: If true, the user story does not require network.
   """
 
-  def __init__(self, shared_user_story_state_class, name='', labels=None):
+  def __init__(self, shared_user_story_state_class, name='', labels=None,
+               is_local=False):
     assert issubclass(shared_user_story_state_class,
                       shared_user_story_state.SharedUserStoryState)
     self._shared_user_story_state_class = shared_user_story_state_class
@@ -40,6 +42,7 @@ class UserStory(object):
     else:
       assert isinstance(labels, set)
     self._labels = labels
+    self._is_local = is_local
 
   @property
   def labels(self):
@@ -78,3 +81,8 @@ class UserStory(object):
       return self.name
     else:
       return self.__class__.__name__
+
+  @property
+  def is_local(self):
+    """Returns True iff this user story does not require network."""
+    return self._is_local