Add mobile version of v8.infinite_scroll benchmark.

tools/perf/page_sets/mobile_infinite_scroll_cases.py

+# Copyright 2016 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 page_sets import mobile_facebook_page
+from telemetry.page import page as page_module
+from telemetry.page import shared_page_state
+from telemetry import story
+
+TIME_TO_WAIT_BEFORE_STARTING_IN_SECONDS = 5
+SCROLL_TIMEOUT_IN_SECONDS = 120
+
+# TODO(ulan): Remove this once crbug.com/541508 is fixed.
+STARTUP_SCRIPT = '''
+    window.WebSocket = undefined;
+    window.Worker = undefined;
+    window.performance = undefined;'''
+
+def _ScrollAction(action_runner, scroll_amount, delay, repeat):
+  # with action_runner.CreateInteraction('Begin'):

[eakuefner, 2016/03/09 17:49:08]

Please remove these comments

[ulan, 2016/03/10 11:41:23]

Done.

+  #   action_runner.tab.browser.DumpMemory()
+  with action_runner.CreateInteraction('Scrolling'):
+    action_runner.RepeatableBrowserDrivenScroll(
+      y_scroll_distance_ratio=scroll_amount,
+      repeat_delay_ms=delay,
+      repeat_count=repeat,
+      timeout=SCROLL_TIMEOUT_IN_SECONDS)
+  # with action_runner.CreateInteraction('End'):

[eakuefner, 2016/03/09 17:49:08]

And here

[ulan, 2016/03/10 11:41:23]

Done.

+  #   action_runner.tab.browser.DumpMemory()
+
+def _WaitAction(action_runner):
+  with action_runner.CreateInteraction('Load'):
+    action_runner.WaitForJavaScriptCondition(
+      'document.body != null && '
+      'document.body.scrollHeight > window.innerHeight && '
+      '!document.body.addEventListener("touchstart", function() {})')
+  with action_runner.CreateInteraction('Wait'):
+    action_runner.Wait(TIME_TO_WAIT_BEFORE_STARTING_IN_SECONDS)
+  with action_runner.CreateInteraction('GC'):
+    action_runner.ForceGarbageCollection()
+
+class MobileInfiniteScrollPage(page_module.Page):
+  def __init__(self, url, page_set, name, scroll_amount, delay, repeat,
+               credentials=None):
+    super(MobileInfiniteScrollPage, self).__init__(
+        url=url, page_set=page_set, name=name,
+        shared_page_state_class=shared_page_state.SharedPageState,
+       credentials_path='data/credentials.json')
+    self.credentials = credentials
+    self.script_to_evaluate_on_commit = STARTUP_SCRIPT
+    self.scroll_amount = scroll_amount
+    self.delay = delay
+    self.repeat = repeat
+
+  def RunPageInteractions(self, action_runner):
+    _WaitAction(action_runner)
+    _ScrollAction(action_runner, self.scroll_amount, self.delay,
+                       self.repeat)
+
+class MobileInfiniteScrollFacebookPage(mobile_facebook_page.MobileFacebookPage):
+  def __init__(self, url, page_set, name, scroll_amount, delay, repeat):
+    super(MobileInfiniteScrollFacebookPage, self).__init__(
+        url=url, page_set=page_set,
+        shared_page_state_class=shared_page_state.SharedPageState,
+        name=name)
+    self.script_to_evaluate_on_commit = STARTUP_SCRIPT
+    self.scroll_amount = scroll_amount
+    self.delay = delay
+    self.repeat = repeat
+
+  def RunPageInteractions(self, action_runner):
+    _WaitAction(action_runner)
+    _ScrollAction(action_runner, self.scroll_amount, self.delay,
+                       self.repeat)
+
+class MobileInfiniteScrollPageSet(story.StorySet):
+  """ Top mobile pages that can be scrolled for many pages. """
+  def __init__(self):
+    super(MobileInfiniteScrollPageSet, self).__init__(
+        archive_data_file='data/mobile_infinite_scroll.json',
+        cloud_storage_bucket=story.PARTNER_BUCKET)
+    # The scroll distance is chosen such that the page can be scrolled
+    # continuously through the test without hitting the end of the page.
+    SCROLL_FAR = 60
+    SCROLL_PAGE = 1
+    pages = [
+        ('https://m.facebook.com/shakira', 'facebook', SCROLL_FAR, 0, 0),
+        ('https://mobile.twitter.com/taylorswift13', 'twitter', SCROLL_PAGE, 10, 30),
+        ('http://techcrunch.tumblr.com/', 'tumblr', SCROLL_FAR, 0, 0),
+        ('https://www.flickr.com/explore', 'flickr', SCROLL_FAR, 0, 0),
+        ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482',
+         'discourse', SCROLL_PAGE, 10, 30)
+    ]
+    self.AddStory(
+      MobileInfiniteScrollFacebookPage(pages[0][0], self, pages[0][1],
+                                       pages[0][2], pages[0][3], pages[0][4]))
+    for (url, name, scroll_amount, delay, repeat) in pages[1:]:
+      self.AddStory(
+        MobileInfiniteScrollPage(url, self, name, scroll_amount, delay, repeat))