Updating references from story.display_name to story.name

tools/perf/contrib/cluster_telemetry/screenshot.py

 # Copyright 2017 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 logging
 import os
 import py_utils
 import time
 
 from telemetry.page import legacy_page_test
 from telemetry.util import image_util
 
 class Screenshot(legacy_page_test.LegacyPageTest):
   """Takes a PNG screenshot of the page."""
 
   def __init__(self, png_outdir, wait_time=0):
     super(Screenshot, self).__init__()
     self._png_outdir = png_outdir
     self._wait_time = wait_time
 
   def ValidateAndMeasurePage(self, page, tab, results):
     if not tab.screenshot_supported:
       raise legacy_page_test.MeasurementFailure(
         'Screenshotting not supported on this platform')
 
     try:
       tab.WaitForDocumentReadyStateToBeComplete()
     except py_utils.TimeoutException:
       logging.warning("WaitForDocumentReadyStateToBeComplete() timeout, " +
-                      "page: %s", page.display_name)
+                      "page: %s", page.name)
       return
 
     time.sleep(self._wait_time)
 
     if not os.path.exists(self._png_outdir):
       logging.info("Creating directory %s", self._png_outdir)
       try:
         os.makedirs(self._png_outdir)
       except OSError:
         logging.warning("Directory %s could not be created", self._png_outdir)
         raise
 
     outpath = os.path.abspath(
         os.path.join(self._png_outdir, page.file_safe_name)) + '.png'
     # Replace win32 path separator char '\' with '\\'.
     outpath = outpath.replace('\\', '\\\\')
 
     screenshot = tab.Screenshot()
 
     # TODO(lchoi): Add logging to image_util.py and/or augment error handling of
     # image_util.WritePngFile
     logging.info("Writing PNG file to %s. This may take awhile.", outpath)
     start = time.time()
     image_util.WritePngFile(screenshot, outpath)
     logging.info("PNG file written successfully. (Took %f seconds)",
                  time.time()-start)