Revert of [Telemetry] Modify CreatePageSet to CreateStorySet

tools/telemetry/telemetry/unittest_util/page_test_test_case.py

Index: tools/telemetry/telemetry/unittest_util/page_test_test_case.py
diff --git a/tools/telemetry/telemetry/unittest_util/page_test_test_case.py b/tools/telemetry/telemetry/unittest_util/page_test_test_case.py
index c4b3b1ed75798d445e97ecb4bdd83f898debd572..9634f31473e0c13913e704160abf8568c63264da 100644
--- a/tools/telemetry/telemetry/unittest_util/page_test_test_case.py
+++ b/tools/telemetry/telemetry/unittest_util/page_test_test_case.py
@@ -35,7 +35,7 @@
 class PageTestTestCase(unittest.TestCase):
   """A base class to simplify writing unit tests for PageTest subclasses."""
 
-  def CreateStorySetFromFileInUnittestDataDir(self, test_filename):
+  def CreatePageSetFromFileInUnittestDataDir(self, test_filename):
     ps = self.CreateEmptyPageSet()
     page = BasicTestPage('file://' + test_filename, ps, base_dir=ps.base_dir)
     ps.AddUserStory(page)
@@ -72,7 +72,7 @@
     return results
 
   def TestTracingCleanedUp(self, measurement_class, options=None):
-    ps = self.CreateStorySetFromFileInUnittestDataDir('blank.html')
+    ps = self.CreatePageSetFromFileInUnittestDataDir('blank.html')
     start_tracing_called = [False]
     stop_tracing_called = [False]