Kill PageSet.AddPage and its remaining usage

content/test/gpu/gpu_tests/context_lost.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os
 import time
 
 import context_lost_expectations
 
 from telemetry import benchmark as benchmark_module
 from telemetry.core import exceptions
@@ skipping 310 matching lines @@
     return context_lost_expectations.ContextLostExpectations()
 
   # For the record, this would have been another way to get the pages
   # to repeat. pageset_repeat would be another option.
   # options = {'page_repeat': 5}
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       file_path=data_path,
       user_agent_type='desktop',
       serving_dirs=set(['']))
-    ps.AddPage(GPUProcessCrashesExactlyOnce(ps, ps.base_dir))
-    ps.AddPage(WebGLContextLostFromGPUProcessExitPage(ps, ps.base_dir))
-    ps.AddPage(WebGLContextLostFromLoseContextExtensionPage(ps, ps.base_dir))
-    ps.AddPage(WebGLContextLostFromQuantityPage(ps, ps.base_dir))
-    ps.AddPage(WebGLContextLostFromSelectElementPage(ps, ps.base_dir))
-    ps.AddPage(WebGLContextLostInHiddenTabPage(ps, ps.base_dir))
+    ps.AddUserStory(GPUProcessCrashesExactlyOnce(ps, ps.base_dir))
+    ps.AddUserStory(WebGLContextLostFromGPUProcessExitPage(ps, ps.base_dir))
+    ps.AddUserStory(
+        WebGLContextLostFromLoseContextExtensionPage(ps, ps.base_dir))
+    ps.AddUserStory(WebGLContextLostFromQuantityPage(ps, ps.base_dir))
+    ps.AddUserStory(WebGLContextLostFromSelectElementPage(ps, ps.base_dir))
+    ps.AddUserStory(WebGLContextLostInHiddenTabPage(ps, ps.base_dir))
     return ps