[telemetry] Add new benchmarks and rename them all.

tools/perf/benchmarks/page_cycler.py

Index: tools/perf/benchmarks/page_cycler.py
diff --git a/tools/perf/benchmarks/page_cycler.py b/tools/perf/benchmarks/page_cycler.py
index 1552bc8c4a5607e5c8395212839794a8ce2098f5..3493d2c8d25f40c90e8d58a0e12bf645993fdcf5 100644
--- a/tools/perf/benchmarks/page_cycler.py
+++ b/tools/perf/benchmarks/page_cycler.py
@@ -68,9 +68,11 @@ class PageCyclerMoz(test.Test):
 
 class PageCyclerNetsimTop10(test.Test):
   """Measures load time of the top 10 sites under simulated cable network."""
+  tag = 'netsim'
   test = page_cycler.PageCycler
   page_set = 'page_sets/top_10.json'
   options = {
+    'cold_load_percent': 100,
     'extra_wpr_args': [
       '--shaping_type=proxy',
       '--net=cable'
@@ -85,6 +87,12 @@ class PageCyclerNetsimTop10(test.Test):
     self.test.clear_cache_before_each_run = True
 
 
+class PageCyclerToughLayoutCases(test.Test):
+  test = page_cycler.PageCycler
+  page_set = 'page_sets/tough_layout_cases.json'
+  options = {'pageset_repeat_iters': 10}
+
+
 class PageCyclerTypical25(test.Test):
   test = page_cycler.PageCycler
   page_set = 'page_sets/typical_25.json'