BrowserOptions.extra_browser_args is now a set.

tools/perf/benchmarks/spaceport.py

 # Copyright (c) 2012 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.
 
 """Runs spaceport.io's PerfMarks benchmark."""
 
 import logging
 import os
 
 from telemetry import test
 from telemetry.core import util
 from telemetry.page import page_measurement
 from telemetry.page import page_set
 
 
 class SpaceportMeasurement(page_measurement.PageMeasurement):
   def CustomizeBrowserOptions(self, options):
-    options.extra_browser_args.extend(['--disable-gpu-vsync'])
+    options.AppendExtraBrowserArgs('--disable-gpu-vsync')
 
   def MeasurePage(self, _, tab, results):
     util.WaitFor(lambda: tab.EvaluateJavaScript(
         '!document.getElementById("start-performance-tests").disabled'), 60)
 
     tab.ExecuteJavaScript("""
         window.__results = {};
         window.console.log = function(str) {
             if (!str) return;
             var key_val = str.split(': ');
@@ skipping 28 matching lines @@
 class Spaceport(test.Test):
   """spaceport.io's PerfMarks benchmark."""
   test = SpaceportMeasurement
 
   def CreatePageSet(self, options):
     spaceport_dir = os.path.join(util.GetChromiumSrcDir(), 'chrome', 'test',
         'data', 'third_party', 'spaceport')
     return page_set.PageSet.FromDict(
         {'pages': [{'url': 'file:///index.html'}]},
         spaceport_dir)