Rename telemetry.test.Test to telemetry.benchmark.Benchmark.

tools/perf/benchmarks/start_with_url.py

 # Copyright 2014 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 test
+from telemetry import benchmark
 
 from measurements import startup
 import page_sets
 
 
-@test.Disabled('snowleopard') # crbug.com/336913
-class StartWithUrlCold(test.Test):
+@benchmark.Disabled('snowleopard') # crbug.com/336913
+class StartWithUrlCold(benchmark.Benchmark):
   """Measure time to start Chrome cold with startup URLs"""
   tag = 'cold'
   test = startup.StartWithUrl
   page_set = page_sets.StartupPagesPageSet
   options = {'cold': True,
              'pageset_repeat': 5}
 
-class StartWithUrlWarm(test.Test):
+class StartWithUrlWarm(benchmark.Benchmark):
   """Measure time to start Chrome warm with startup URLs"""
   tag = 'warm'
   test = startup.StartWithUrl
   page_set = page_sets.StartupPagesPageSet
   options = {'warm': True,
              'pageset_repeat': 10}