Add perf tests for starting Chrome with URL

tools/perf/measurements/startwithurl.py

-# Copyright 2013 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.
-
-from measurements import startup
-from metrics import startup_metric
-
-class StartWithUrl(startup.Startup):
-  """Measures Chromium's startup performance when started with a URL
-
-  This test inherits support for the --warm or --cold command line options -
-  see startup.py for details.
-  """
-
-  def __init__(self):
-    super(StartWithUrl, self).__init__()
-    self.close_tabs_before_run = False
-
-
-  def AddCommandLineOptions(self, parser):
-    super(StartWithUrl, self).AddCommandLineOptions(parser)
-    parser.add_option('--url', action='store', default=None,
-                      help='Start with a request to open a specific URL')
-
-  def CustomizeBrowserOptions(self, options):
-    super(StartWithUrl, self).CustomizeBrowserOptions(options)
-    if options.url:
-      browser_options = options.browser_options
-      browser_options.startup_url = options.url
-    options.AppendExtraBrowserArgs([
-        '--restore-last-session'
-    ])
-
-  def CanRunForPage(self, page):
-    # No matter how many pages in the pageset, just perform one test iteration.
-    return page.page_set.pages.index(page) == 0
-
-  def RunNavigateSteps(self, page, tab):
-    # Overriden so that no page navigation occurs.
-    pass
-
-  def ValidatePageSet(self, page_set):
-    # Reject any pageset that contains more than one WPR archive.
-    wpr_archives = {}
-    for page in page_set:
-      wpr_archives[page_set.WprFilePathForPage(page)] = True
-
-    if len(wpr_archives.keys()) > 1:
-      raise Exception("Invalid pageset: more than 1 WPR archive found.: " +
-          ', '.join(wpr_archives.keys()))
-
-  def MeasurePage(self, page, tab, results):
-    # Wait for all tabs to finish loading.
-    for i in xrange(len(tab.browser.tabs)):
-      t = tab.browser.tabs[i]
-      t.WaitForDocumentReadyStateToBeComplete()
-
-    startup_metric.StartupMetric().AddResults(tab, results)
-