[tools/perf] Add a broken page to dummy_benchmark.noisy_benchmark_1

tools/perf/page_sets/dummy_story_set.py

Index: tools/perf/page_sets/dummy_story_set.py
diff --git a/tools/perf/page_sets/dummy_story_set.py b/tools/perf/page_sets/dummy_story_set.py
index 5575468fd59874b0e693f0211aefa58e80e5d7a4..b594f2616731f8a2ddc1a993de37e9c17ee83b39 100644
--- a/tools/perf/page_sets/dummy_story_set.py
+++ b/tools/perf/page_sets/dummy_story_set.py
@@ -12,10 +12,23 @@ class DummyPage(page_module.Page):
       url='file://dummy_page.html',
       page_set=page_set)
 
-  def PerformPageInteractions(self, action_runner):
+  def RunPageInteractions(self, action_runner):
     assert action_runner.EvaluateJavaScript('1 + window.__dummy_value') == 2
 
 
+class BrokenDummyPage(page_module.Page):
+
+  def __init__(self, page_set):
+    super(BrokenDummyPage, self).__init__(
+      url='file://dummy_page.html',
+      name='Broken dummy page',
+      page_set=page_set)
+
+  def RunPageInteractions(self, action_runner):
+    # The call below should raise an AssertionError
+    assert action_runner.EvaluateJavaScript('1 + window.__dummy_value') == 3
+
+
 class DummyStorySet(story.StorySet):
 
   def __init__(self):