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

tools/perf/benchmarks/start_with_url.py

Index: tools/perf/benchmarks/start_with_url.py
diff --git a/tools/perf/benchmarks/start_with_url.py b/tools/perf/benchmarks/start_with_url.py
index 895dd9116c37f4ee3bea907fe4a9820ca628cd8c..b331bc9f1f2ba29bcd703798bfc72694c430a54d 100644
--- a/tools/perf/benchmarks/start_with_url.py
+++ b/tools/perf/benchmarks/start_with_url.py
@@ -11,6 +11,10 @@ class _StartWithUrl(benchmark.Benchmark):
   page_set = page_sets.StartupPagesPageSet
   test = startup.StartWithUrl
 
+  @classmethod
+  def Name(cls):
+    return 'start_with_url.startup_pages'
+
   def CreatePageTest(self, options):
     is_cold = (self.tag == 'cold')
     return self.test(cold=is_cold)
@@ -23,6 +27,10 @@ class StartWithUrlCold(_StartWithUrl):
   tag = 'cold'
   options = {'pageset_repeat': 5}
 
+  @classmethod
+  def Name(cls):
+    return 'start_with_url.cold.startup_pages'
+
 
 @benchmark.Enabled('has tabs')
 @benchmark.Disabled('chromeos', 'linux', 'mac', 'win')
@@ -30,3 +38,7 @@ class StartWithUrlWarm(_StartWithUrl):
   """Measure time to start Chrome warm with startup URLs"""
   tag = 'warm'
   options = {'pageset_repeat': 10}
+  @classmethod
+  def Name(cls):
+    return 'start_with_url.warm.startup_pages'
+