[Telemetry] Fix swipe_to_dimiss page in key_silk_cases and disable slide_drawer page.

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 267 matching lines @@
     action_runner.Wait(2)
 
   def SwipeToDismiss(self, action_runner):
     interaction = action_runner.BeginGestureInteraction(
         'SwipeAction', is_smooth=True)
     action_runner.SwipeElement(
         left_start_ratio=0.8, top_start_ratio=0.2,
         direction='left', distance=400, speed_in_pixels_per_second=5000,
         element_function='document.getElementsByClassName("message")[2]')
     interaction.End()
-    interaction = action_runner.BeginInteraction('Wait', is_smooth=True)
-    action_runner.WaitForJavaScriptCondition(
-        'document.getElementsByClassName("message").length < 18')
-    interaction.End()
 
   def RunPageInteractions(self, action_runner):
     self.SwipeToDismiss(action_runner)
 
 
 class Page17(KeySilkCasesPage):
 
   def __init__(self, page_set):
     super(Page17, self).__init__(
       url='file://key_silk_cases/inbox_app.html?stress_hidey_bars',
@@ skipping 367 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))
-    self.AddUserStory(Page19(self))
+    # Missing frames during tap interaction; crbug.com/446332
+    # 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))