Explicitly set story names for service_worker benchmark stories

tools/perf/page_sets/service_worker_micro_benchmark.py

Index: tools/perf/page_sets/service_worker_micro_benchmark.py
diff --git a/tools/perf/page_sets/service_worker_micro_benchmark.py b/tools/perf/page_sets/service_worker_micro_benchmark.py
index 21f1c8e1f21478c6d4a2f37105b759a81114a509..57f98483d6c13ab2c4329c27bc13d2093c3d48de 100644
--- a/tools/perf/page_sets/service_worker_micro_benchmark.py
+++ b/tools/perf/page_sets/service_worker_micro_benchmark.py
@@ -20,7 +20,8 @@ class ServiceWorkerMicroBenchmarkPageSet(story.StorySet):
   def __init__(self):
     super(ServiceWorkerMicroBenchmarkPageSet, self).__init__(
         archive_data_file='data/service_worker_micro_benchmark.json',
-        cloud_storage_bucket=story.PUBLIC_BUCKET)
+        cloud_storage_bucket=story.PUBLIC_BUCKET,
+        verify_names=True)
 
     # pylint: disable=line-too-long
     # The latest code of localhost:8091 is from:
@@ -31,4 +32,5 @@ class ServiceWorkerMicroBenchmarkPageSet(story.StorySet):
     # Why: to measure performance of many concurrent fetches
     self.AddStory(ServiceWorkerBenchmarkPage(
         'http://localhost:8091/index.html', self,
-        make_javascript_deterministic=False))
+        make_javascript_deterministic=False,
+        name='http://localhost:8091/index.html'))