Adding a test for measuring memory usage.

tools/perf/perf_tools/multipage_benchmark_runner.py

 #!/usr/bin/env python
 # 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.
 import csv
 import logging
 import os
 import sys
 
 from chrome_remote_control import browser_finder
 from chrome_remote_control import browser_options
 from chrome_remote_control import multi_page_benchmark
 from chrome_remote_control import page_runner
 from chrome_remote_control import page_set
 
 import perf_tools.first_paint_time_benchmark
 import perf_tools.jsgamebench
 import perf_tools.kraken
+import perf_tools.memory_benchmark
 import perf_tools.robohornetpro
 import perf_tools.scrolling_benchmark
 import perf_tools.skpicture_printer
 import perf_tools.texture_upload_benchmark
 
 # TODO(tonyg/nduca): Discover benchmarks automagically.
 _BENCHMARKS = {
   'first_paint_time_benchmark':
       perf_tools.first_paint_time_benchmark.FirstPaintTimeBenchmark,
   'jsgamebench':
       perf_tools.jsgamebench.JsGameBench,
   'kraken':
       perf_tools.kraken.Kraken,
+  'memory_benchmark':
+      perf_tools.memory_benchmark.MemoryBenchmark,
   'robohornetpro':
       perf_tools.robohornetpro.RobohornetPro,
   'scrolling_benchmark':
       perf_tools.scrolling_benchmark.ScrollingBenchmark,
   'skpicture_printer':
       perf_tools.skpicture_printer.SkPicturePrinter,
   'texture_upload_benchmark':
       perf_tools.texture_upload_benchmark.TextureUploadBenchmark
 }
 
@@ skipping 43 matching lines @@
   with page_runner.PageRunner(ps) as runner:
     runner.Run(options, possible_browser, benchmark, results)
   # When using an exact executable, assume it is a reference build for the
   # purpose of outputting the perf results.
   results.PrintSummary(options.browser_executable and '_ref' or '')
 
   if len(results.page_failures):
     logging.warning('Failed pages: %s', '\n'.join(
         [failure['page'].url for failure in results.page_failures]))
   return min(255, len(results.page_failures))