There is no dialog latency data since yesterday, it is caused by crrev.com/1907073002, the action t…

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 15 matching lines @@
 class CastDialogPage(media_router_page.CastPage):
   """Cast page to open a cast-enabled page and open media router dialog."""
 
   def __init__(self, page_set, url='file://basic_test.html',
                shared_page_state_class=shared_page_state.SharedPageState):
     super(CastDialogPage, self).__init__(
         url=url, page_set=page_set,
         shared_page_state_class=shared_page_state_class)
 
   def RunPageInteractions(self, action_runner):
-     pass
+    # Wait for 5s after Chrome is opened in order to get consistent results.
+    action_runner.Wait(5)
+    with action_runner.CreateInteraction('OpenDialog'):
+      # Open dialog
+      action_runner.TapElement(selector='#start_session_button')
+      action_runner.Wait(5)
+      # Close media router dialog
+      for tab in action_runner.tab.browser.tabs:
+        if tab.url == 'chrome://media-router/':
+          self.CloseDialog(tab)
 
 
 class CastIdlePage(CastDialogPage):
   """Cast page to open a cast-enabled page and do nothing."""
 
   def __init__(self, page_set):
     super(CastIdlePage, self).__init__(
         page_set=page_set,
         url='file://basic_test.html',
         shared_page_state_class=SharedState)
@@ skipping 73 matching lines @@
 
 
 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)
     self.AddStory(CastIdlePage(self))
     self.AddStory(CastFlingingPage(self))