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

tools/perf/benchmarks/repaint.py

Index: tools/perf/benchmarks/repaint.py
diff --git a/tools/perf/benchmarks/repaint.py b/tools/perf/benchmarks/repaint.py
index 194b57453ac577e0af92c2728ef1817d0fdb95c1..b39a6238fc1b191cadf3632de342a0757655315a 100644
--- a/tools/perf/benchmarks/repaint.py
+++ b/tools/perf/benchmarks/repaint.py
@@ -22,6 +22,10 @@ class _Repaint(benchmark.Benchmark):
                       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)
@@ -33,6 +37,10 @@ class RepaintKeyMobileSites(_Repaint):
   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):
@@ -44,3 +52,7 @@ class RepaintGpuRasterizationKeyMobileSites(_Repaint):
   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'
+