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

tools/perf/benchmarks/repaint.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 benchmarks import silk_flags
 from measurements import repaint as repaint_measurement
 import page_sets
 from telemetry import benchmark
 
 
 class _Repaint(benchmark.Benchmark):
   @classmethod
   def AddBenchmarkCommandLineArgs(cls, parser):
     parser.add_option('--mode', type='string',
                       default='viewport',
                       help='Invalidation mode. '
                       'Supported values: fixed_size, layer, random, viewport.')
     parser.add_option('--width', type='int',
                       default=None,
                       help='Width of invalidations for fixed_size mode.')
     parser.add_option('--height', type='int',
                       default=None,
                       help='Height of invalidations for fixed_size mode.')
 
+  @classmethod
+  def Name(cls):
+    return 'repaint'
+
   def CreatePageTest(self, options):
     return repaint_measurement.Repaint(options.mode, options.width,
                                        options.height)
 
 @benchmark.Enabled('android')
 class RepaintKeyMobileSites(_Repaint):
   """Measures repaint performance on the key mobile sites.
 
   http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
   page_set = page_sets.KeyMobileSitesRepaintPageSet
 
+  @classmethod
+  def Name(cls):
+    return 'repaint.key_mobile_sites_repaint'
+
 
 @benchmark.Enabled('android')
 class RepaintGpuRasterizationKeyMobileSites(_Repaint):
   """Measures repaint performance on the key mobile sites with forced GPU
   rasterization.
 
   http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
   tag = 'gpu_rasterization'
   page_set = page_sets.KeyMobileSitesRepaintPageSet
   def CustomizeBrowserOptions(self, options):
     silk_flags.CustomizeBrowserOptionsForGpuRasterization(options)
+  @classmethod
+  def Name(cls):
+    return 'repaint.gpu_rasterization.key_mobile_sites_repaint'
+