Fail run_benchmark if archive_data_file is specified and not found

telemetry/telemetry/story/story_set.py

Index: telemetry/telemetry/story/story_set.py
diff --git a/telemetry/telemetry/story/story_set.py b/telemetry/telemetry/story/story_set.py
index 667cbd01ebb7b9b3114da16ae16933335b97f9ef..a4f8c3f3c5e119efe1b2379a83a6b70ac73dfbfe 100644
--- a/telemetry/telemetry/story/story_set.py
+++ b/telemetry/telemetry/story/story_set.py
@@ -32,6 +32,11 @@ class StorySet(object):
           storage.
     """
     self.stories = []
+    archive_data_file_path = archive_data_file
+    if base_dir:
+      archive_data_file_path = os.path.join(base_dir, archive_data_file)
+    if archive_data_file and not os.path.exists(archive_data_file_path):
+      raise IOError('%s is not found' % archive_data_file_path)
     self._archive_data_file = archive_data_file
     self._wpr_archive_info = None
     archive_info.AssertValidCloudStorageBucket(cloud_storage_bucket)