Add a broken page to dummy_benchmark.noisy_benchmark_1

tools/perf/benchmarks/dummy_benchmark.py

Index: tools/perf/benchmarks/dummy_benchmark.py
diff --git a/tools/perf/benchmarks/dummy_benchmark.py b/tools/perf/benchmarks/dummy_benchmark.py
index ff23671ecc95ab6b5f0793320a425c183a6b59c4..227d9e88229ced6c955383fb12f89c0736395d63 100644
--- a/tools/perf/benchmarks/dummy_benchmark.py
+++ b/tools/perf/benchmarks/dummy_benchmark.py
@@ -59,3 +59,10 @@ class DummyBenchmarkTwo(_DummyBenchmark):
   @classmethod
   def Name(cls):
     return 'dummy_benchmark.noisy_benchmark_1'
+
+  def CreateStorySet(self, options):
+    del options  # unused
+    story_set = dummy_story_set.DummyStorySet()
+    story_set.AddStory(dummy_story_set.BrokenDummyPage(story_set))
+    return story_set
+