Add perf tests for starting Chrome with URL

tools/perf/measurements/session_restore.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 cpu
 from metrics import startup_metric
 
 
 class SessionRestore(startup.Startup):
@@ skipping 20 matching lines @@
     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 not page.is_local:
+        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 DidStartBrowser(self, browser):
     self._cpu_metric = cpu.CpuMetric(browser)
     self._cpu_metric.Start(None, None)
 
   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()
 
     # Record CPU usage from browser start to when all pages have loaded.
     self._cpu_metric.Stop(None, None)
     self._cpu_metric.AddResults(tab, results, 'cpu_utilization')
 
     startup_metric.StartupMetric().AddResults(tab, results)
 
     # TODO(jeremy): Measure time to load - first, last and frontmost tab here.