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

tools/perf/benchmarks/memory.py

Index: tools/perf/benchmarks/memory.py
diff --git a/tools/perf/benchmarks/memory.py b/tools/perf/benchmarks/memory.py
index 8f4cbd692721f526538686e853f36c04d17d620c..2f05fb28fd51b754c523ca4ab650846d564d4cae 100644
--- a/tools/perf/benchmarks/memory.py
+++ b/tools/perf/benchmarks/memory.py
@@ -12,6 +12,10 @@ class MemoryMobile(benchmark.Benchmark):
   test = memory.Memory
   page_set = page_sets.MobileMemoryPageSet
 
+  @classmethod
+  def Name(cls):
+    return 'memory.mobile_memory'
+
 
 @benchmark.Disabled
 class MemoryTop7Stress(benchmark.Benchmark):
@@ -19,6 +23,10 @@ class MemoryTop7Stress(benchmark.Benchmark):
   test = memory.Memory
   page_set = page_sets.Top7StressPageSet
 
+  @classmethod
+  def Name(cls):
+    return 'memory.top_7_stress'
+
 
 @benchmark.Disabled
 class Reload2012Q3(benchmark.Benchmark):
@@ -29,12 +37,20 @@ class Reload2012Q3(benchmark.Benchmark):
   test = memory.Memory
   page_set = page_sets.Top2012Q3StressPageSet
 
+  @classmethod
+  def Name(cls):
+    return 'memory.reload.top_desktop_sites_2012Q3_stress'
+
 
 @benchmark.Disabled  # crbug.com/371153
 class MemoryToughDomMemoryCases(benchmark.Benchmark):
   test = memory.Memory
   page_set = page_sets.ToughDomMemoryCasesPageSet
 
+  @classmethod
+  def Name(cls):
+    return 'memory.tough_dom_memory_cases'
+
 
 @benchmark.Disabled('chromeos', 'linux', 'mac', 'win')
 @benchmark.Enabled('has tabs')
@@ -43,3 +59,7 @@ class TypicalMobileSites(benchmark.Benchmark):
   test = memory.Memory
   page_set = page_sets.TypicalMobileSitesPageSet
   options = {'pageset_repeat': 15}
+  @classmethod
+  def Name(cls):
+    return 'memory.typical_mobile_sites'
+