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

tools/perf/benchmarks/skpicture_printer.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 measurements import skpicture_printer
 from telemetry import benchmark
 from telemetry.core import discover
 from telemetry.page import page_set
 
 
@@ skipping 18 matching lines @@
                       help='Output directory for the SKP files')
   @classmethod
   def ProcessCommandLineArgs(cls, parser, args):
     if not args.page_set_name:
       parser.error('Please specify --page-set-name')
     if not args.page_set_base_dir:
       parser.error('Please specify --page-set-base-dir')
     if not args.skp_outdir:
       parser.error('Please specify --skp-outdir')
 
+  @classmethod
+  def Name(cls):
+    return 'skpicture_printer'
+
   def CreatePageTest(self, options):
     return skpicture_printer.SkpicturePrinter(options.skp_outdir)
 
   def CreatePageSet(self, options):
     page_set_class = _MatchPageSetName(options.page_set_name,
                                        options.page_set_base_dir)
     return page_set_class()