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

tools/perf/benchmarks/robohornet_pro.py

 # Copyright 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 Microsoft's RoboHornet Pro benchmark."""
 
 import os
 
 from metrics import power
 from telemetry import benchmark
@@ skipping 36 matching lines @@
 # we need to wait until Chrome OS can implement support for more helpful
 # benchmarks.
 @benchmark.Enabled('chromeos')
 class RobohornetPro(benchmark.Benchmark):
   """Milliseconds to complete the RoboHornetPro demo by Microsoft.
 
   http://ie.microsoft.com/testdrive/performance/robohornetpro/
   """
   test = _RobohornetProMeasurement
 
+  @classmethod
+  def Name(cls):
+    return 'robohornet_pro'
+
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
         archive_data_file='../page_sets/data/robohornet_pro.json',
         file_path=os.path.abspath(__file__),
         bucket=page_set.PARTNER_BUCKET)
     ps.AddUserStory(page_module.Page(
         'http://ie.microsoft.com/testdrive/performance/robohornetpro/',
         ps, ps.base_dir,
         # Measurement require use of real Date.now() for measurement.
         make_javascript_deterministic=False))
     return ps