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

tools/perf/benchmarks/session_restore.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 os
 import tempfile
 
 from measurements import session_restore
 import page_sets
 from profile_creators import small_profile_creator
 from telemetry import benchmark
 from telemetry.page import profile_generator
 
 
 class _SessionRestoreTest(benchmark.Benchmark):
 
   @classmethod
+  def Name(cls):
+    return 'session_restore'
+
+  @classmethod
   def ProcessCommandLineArgs(cls, parser, args):
     super(_SessionRestoreTest, cls).ProcessCommandLineArgs(parser, args)
     profile_type = 'small_profile'
     if not args.browser_options.profile_dir:
       output_dir = os.path.join(tempfile.gettempdir(), profile_type)
       profile_dir = os.path.join(output_dir, profile_type)
       if not os.path.exists(output_dir):
         os.makedirs(output_dir)
 
       # Generate new profiles if profile_dir does not exist. It only exists if
@@ skipping 10 matching lines @@
     is_cold = (self.tag == 'cold')
     return session_restore.SessionRestore(cold=is_cold)
 
 # crbug.com/325479, crbug.com/381990
 @benchmark.Disabled('android', 'linux', 'reference')
 class SessionRestoreColdTypical25(_SessionRestoreTest):
   tag = 'cold'
   page_set = page_sets.Typical25PageSet
   options = {'pageset_repeat': 5}
 
+  @classmethod
+  def Name(cls):
+    return 'session_restore.cold.typical_25'
+
 
 # crbug.com/325479, crbug.com/381990
 @benchmark.Disabled('android', 'linux', 'reference')
 class SessionRestoreWarmTypical25(_SessionRestoreTest):
   tag = 'warm'
   page_set = page_sets.Typical25PageSet
   options = {'pageset_repeat': 20}
+  @classmethod
+  def Name(cls):
+    return 'session_restore.warm.typical_25'
+