Merge tough_scrolling_cases into rendering page set

Move tough_scrolling_cases into the rendering folder and refactor to
inherit from RenderingStory

Bug: 849392
Change-Id: I7edf70dedb6fd74e2741c568cfc5df35a35ecbf1
Reviewed-on: https://chromium-review.googlesource.com/1089038
Commit-Queue: Amy Qiu <amyqiu@google.com>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#565009}

tools/perf/expectations.config

@@ -169,6 +169,16 @@ crbug.com/653993 [ Android_Webview ] rendering.mobile/maps_perf_test [ Skip ]
 [ All ] rendering.mobile/paper_tabs [ Skip ] # Polymer test, needs to be modernized.
 [ All ] rendering.mobile/paper_toggle_button [ Skip ] # Polymer test, needs to be modernized.
 crbug.com/822925 [ Android_Webview ] rendering.mobile/yahoo_games_pinch [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_15000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_20000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_40000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_50000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_10000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_05000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_30000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_75000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_60000_pixels_per_second [ Skip ]
+crbug.com/785473 [ Android_Webview ] rendering.mobile/canvas_90000_pixels_per_second [ Skip ]
 
 # Benchmark: smoothness.gpu_rasterization.polymer
 [ All ] smoothness.gpu_rasterization.polymer/* [ Skip ] # Test needs to be modernized.

tools/perf/page_sets/tough_scrolling_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.internal.actions import page_action
-from telemetry.page import page as page_module
-from telemetry import story
-
-
-class ToughFastScrollingCasesPage(page_module.Page):
-
-  def __init__(self, url, name, speed_in_pixels_per_second, page_set,
-               synthetic_gesture_source):
-    super(ToughFastScrollingCasesPage, self).__init__(
-      url=url,
-      page_set=page_set,
-      name=name)
-    self.speed_in_pixels_per_second = speed_in_pixels_per_second
-    self.synthetic_gesture_source = synthetic_gesture_source
-
-  def RunPageInteractions(self, action_runner):
-    with action_runner.CreateGestureInteraction('ScrollAction'):
-      action_runner.ScrollPage(
-          direction='down',
-          speed_in_pixels_per_second=self.speed_in_pixels_per_second,
-          synthetic_gesture_source=self.synthetic_gesture_source)
-
-class ToughScrollingCasesPageSet(story.StorySet):
-
-  """
-  Description: A collection of difficult scrolling tests
-  """
-
-  def __init__(self):
-    super(ToughScrollingCasesPageSet, self).__init__()
-
-    fast_scrolling_page_name_list = [
-      'text',
-      'text_hover',
-      'text_constant_full_page_raster',
-      'canvas'
-    ]
-
-    fast_scrolling_speed_list = [
-      5000, 10000, 15000, 20000, 30000, 40000, 50000, 60000, 75000, 90000
-    ]
-
-    for name in fast_scrolling_page_name_list:
-      for speed in fast_scrolling_speed_list:
-        synthetic_gesture_source = page_action.GESTURE_SOURCE_DEFAULT
-        if "hover" in name:
-          synthetic_gesture_source = page_action.GESTURE_SOURCE_MOUSE
-        self.AddStory(ToughFastScrollingCasesPage(
-          'file://tough_scrolling_cases/' + name + '.html',
-          name + '_' + str(speed).zfill(5) + '_pixels_per_second',
-          speed,
-          self,
-          synthetic_gesture_source))