Adding a test for measuring memory usage.

tools/perf/perf_tools/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.
 
 from telemetry import multi_page_benchmark
 from telemetry import util
 
 class SpaceportBenchmark(multi_page_benchmark.MultiPageBenchmark):
-  def CustomizeBrowserOptions(self, options):
-    options.extra_browser_args.extend(['--disable-gpu-vsync'])
+  def CustomizeBrowserOptions(self, pages, options):
+    options.AppendExtraBrowserArg('--disable-gpu-vsync')
 
   def MeasurePage(self, _, tab, results):
     tab.runtime.Execute("""
         window.__results = {};
         window.console.log = function(str) {
             if (!str) return;
             var key_val = str.split(': ');
             if (!key_val.length == 2) return;
             __results[key_val[0]] = key_val[1];
         };
         document.getElementById('start-performance-tests').click();
     """)
 
     js_get_results = 'JSON.stringify(window.__results)'
     def _IsDone():
       num_tests_in_benchmark = 30
       result_dict = eval(tab.runtime.Evaluate(js_get_results))
       return num_tests_in_benchmark == len(result_dict)
     util.WaitFor(_IsDone, 1200)
 
     result_dict = eval(tab.runtime.Evaluate(js_get_results))
     for key in result_dict:
       chart, trace = key.split('.', 1)
       results.Add(trace, 'objects (bigger is better)', float(result_dict[key]),
                   chart_name=chart, data_type='unimportant')
     results.Add('Overall', 'objects (bigger is better)',
                 [float(x) for x in result_dict.values()])