Telemetry: Re-enable slide_drawer in key_silk_cases

tools/perf/page_sets/key_silk_cases.py

 # Copyright 2014 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.
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class KeySilkCasesPage(page_module.Page):
 
   def __init__(self, url, page_set):
@@ skipping 658 matching lines @@
     self.AddUserStory(Page9(self))
     self.AddUserStory(Page10(self))
     self.AddUserStory(Page11(self))
     self.AddUserStory(Page12(self))
     self.AddUserStory(Page13(self))
     self.AddUserStory(Page14(self))
     self.AddUserStory(Page15(self))
     self.AddUserStory(Page16(self))
     self.AddUserStory(Page17(self))
     self.AddUserStory(Page18(self))
-    # crbug.com/404317
-    # self.AddUserStory(Page19(self))
+    self.AddUserStory(Page19(self))
     self.AddUserStory(Page20(self))
     self.AddUserStory(GwsGoogleExpansion(self))
     self.AddUserStory(GwsBoogieExpansion(self))
     # Times out on Windows; crbug.com/338838
     # self.AddUserStory(Page22(self))
     self.AddUserStory(Page23(self))
     self.AddUserStory(Page24(self))
     self.AddUserStory(Page25(self))
     self.AddUserStory(Page26(self))
     self.AddUserStory(SVGIconRaster(self))
     self.AddUserStory(UpdateHistoryState(self))
     self.AddUserStory(SilkFinance(self))