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

tools/perf/page_sets/key_silk_cases.py

Index: tools/perf/page_sets/key_silk_cases.py
diff --git a/tools/perf/page_sets/key_silk_cases.py b/tools/perf/page_sets/key_silk_cases.py
index 9dfe8cc90011ec39f0863d2bba13cc2a65d12a02..c906b70b88fe3e5dba01d85029200d14aaeb16e6 100644
--- a/tools/perf/page_sets/key_silk_cases.py
+++ b/tools/perf/page_sets/key_silk_cases.py
@@ -285,10 +285,6 @@ class Page16(KeySilkCasesPage):
         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)
@@ -676,7 +672,8 @@ class KeySilkCasesPageSet(page_set_module.PageSet):
     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))