Add text size animation to silk page set

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 615 matching lines @@
     action_runner.WaitForJavaScriptCondition(
         'window.__history_state_loaded == true;')
 
   def RunSmoothness(self, action_runner):
     interaction = action_runner.BeginInteraction('animation_interaction',
         is_smooth=True)
     action_runner.Wait(5) # JS runs the animation continuously on the page
     interaction.End()
 
 
+class TextSizeAnimation(KeySilkCasesPage):
+
+  """ Why: Scale animation with text. """
+
+  def __init__(self, page_set):
+    super(TextSizeAnimation, self).__init__(
+      url='http://jsbin.com/gikex/2/quiet',
+      page_set=page_set)
+
+    self.gpu_raster = True
+
+  def RunSmoothness(self, action_runner):
+    action_runner.Wait(4)
+
+
 class KeySilkCasesPageSet(page_set_module.PageSet):
 
   """ Pages hand-picked for project Silk. """
 
   def __init__(self):
     super(KeySilkCasesPageSet, self).__init__(
       credentials_path='data/credentials.json',
       user_agent_type='mobile',
       archive_data_file='data/key_silk_cases.json',
       bucket=page_set_module.PARTNER_BUCKET)
@@ skipping 21 matching lines @@
     self.AddPage(Page20(self))
     self.AddPage(GwsGoogleExpansion(self))
     self.AddPage(GwsBoogieExpansion(self))
     self.AddPage(Page22(self))
     self.AddPage(Page23(self))
     self.AddPage(Page24(self))
     self.AddPage(Page25(self))
     self.AddPage(Page26(self))
     self.AddPage(SVGIconRaster(self))
     self.AddPage(UpdateHistoryState(self))
+    self.AddPage(TextSizeAnimation(self))