[Telemetry] Explicitly define Name() method for all perf benchmarks

tools/perf/benchmarks/sunspider.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.
 import collections
 import json
 import os
 
 from metrics import power
 from telemetry import benchmark
 from telemetry import page as page_module
@@ skipping 114 matching lines @@
                     'in sunspider'))
 
 
 class Sunspider(benchmark.Benchmark):
   """Apple's SunSpider JavaScript benchmark.
 
   http://www.webkit.org/perf/sunspider/sunspider.html
   """
   test = _SunspiderMeasurement
 
+  @classmethod
+  def Name(cls):
+    return 'sunspider'
+
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
         archive_data_file='../page_sets/data/sunspider.json',
         file_path=os.path.abspath(__file__),
         bucket=page_set.PARTNER_BUCKET)
     ps.AddUserStory(page_module.Page(
         _URL, ps, ps.base_dir, make_javascript_deterministic=False))
     return ps