Set verify_names=False explicity because it's set to True by default now.

chrome/test/media_router/telemetry/benchmarks/pagesets/media_router_perf_pages.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import utils
 
 from telemetry import page
 from telemetry import story
 from benchmarks.pagesets import media_router_page
 from telemetry.core import exceptions
@@ skipping 162 matching lines @@
       action_runner.ExecuteJavaScript('collectPerfData();')
       action_runner.Wait(SESSION_TIME)
       self.CloseExistingRoute(action_runner, sink_name)
 
 
 class MediaRouterDialogPageSet(story.StorySet):
   """Pageset for media router dialog latency tests."""
 
   def __init__(self):
     super(MediaRouterDialogPageSet, self).__init__(
-        cloud_storage_bucket=story.PARTNER_BUCKET)
+        cloud_storage_bucket=story.PARTNER_BUCKET, verify_names=False)
     self.AddStory(CastDialogPage(self))
 
 
 class MediaRouterCPUMemoryPageSet(story.StorySet):
   """Pageset for media router CPU/memory usage tests."""
 
   def __init__(self):
     super(MediaRouterCPUMemoryPageSet, self).__init__(
-        cloud_storage_bucket=story.PARTNER_BUCKET)
+        cloud_storage_bucket=story.PARTNER_BUCKET, verify_names=False)
     self.AddStory(CastIdlePage(self))
     self.AddStory(CastFlingingPage(self))
     self.AddStory(CastMirroringPage(self))
 
 
 class CPUMemoryPageSet(story.StorySet):
   """Pageset to get baseline CPU and memory usage."""
 
   def __init__(self):
     super(CPUMemoryPageSet, self).__init__(
-        cloud_storage_bucket=story.PARTNER_BUCKET)
+        cloud_storage_bucket=story.PARTNER_BUCKET, verify_names=False)
     self.AddStory(CastIdlePage(self))