Add System health stories for Emerging market

tools/perf/page_sets/system_health/media_stories.py

Index: tools/perf/page_sets/system_health/media_stories.py
diff --git a/tools/perf/page_sets/system_health/media_stories.py b/tools/perf/page_sets/system_health/media_stories.py
index ad079e8d4b515282fcec217d1b9a326dc0bcc3a8..01800d454ab91c04f8fe3353958e6bc76b555e31 100644
--- a/tools/perf/page_sets/system_health/media_stories.py
+++ b/tools/perf/page_sets/system_health/media_stories.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 from page_sets.system_health import platforms
+from page_sets.system_health import story_tags
 from page_sets.system_health import system_health_story
 
 from page_sets.login_helpers import google_login
@@ -12,7 +13,7 @@ from telemetry import benchmark
 from telemetry import decorators
 
 
-class _MediaStory(system_health_story.SystemHealthStory):
+class _PlayMediaStory(system_health_story.SystemHealthStory):
   """Abstract base class for media System Health user stories."""
 
   ABSTRACT_STORY = True
@@ -52,12 +53,12 @@ class _MediaStory(system_health_story.SystemHealthStory):
 
 
 ################################################################################
-# Audio stories.
+# Audio and video stories.
 ################################################################################
 
 
 @benchmark.Disabled('all')  # crbug.com/649392
-class GooglePlayMusicDesktopStory(_MediaStory):
+class GooglePlayMusicDesktopStory(_PlayMediaStory):
   NAME = 'play:media:google_play_music'
   URL = 'https://music.google.com'
 
@@ -82,7 +83,7 @@ class GooglePlayMusicDesktopStory(_MediaStory):
 
 
 @benchmark.Disabled('win')  # crbug.com/649392
-class SoundCloudDesktopStory(_MediaStory):
+class SoundCloudDesktopStory(_PlayMediaStory):
   NAME = 'play:media:soundcloud'
   URL = 'https://soundcloud.com'
 
@@ -100,7 +101,7 @@ class SoundCloudDesktopStory(_MediaStory):
 
 
 @decorators.Disabled('all')  # crbug.com/649392
-class PandoraDesktopStory(_MediaStory):
+class PandoraDesktopStory(_PlayMediaStory):
   NAME = 'play:media:pandora'
   URL = 'https://pandora.com'
 
@@ -114,3 +115,38 @@ class PandoraDesktopStory(_MediaStory):
 
   def _NavigateToMedia(self, action_runner):
     pass  # Audio autoplays on Pandora, no need to search.
+
+
+class YoutubeMobileStory(_PlayMediaStory):

[nednguyen, 2017/04/11 22:24:10]

Also add docstring describe what this story is doing.

[ssid, 2017/04/13 21:08:53]

removed this story for now.

+  NAME = 'browse:media:youtube'
+  URL = 'https://m.youtube.in/watch?v=OnhXkCPMeMc'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+  PLAYER_FUNCTION = 'document.getElementById("player")'
+  STOP_FUNCTION = 'document.getElementsByTagName("video")[0].pause()'
+  TIME_FUNCTION = 'document.getElementsByTagName("video")[0].currentTime'
+
+  def RunPageInteractions(self, action_runner):
+    app_ui = action_runner.tab.browser.app_ui
+    action_runner.WaitForElement(element_function=self.PLAYER_FUNCTION)
+
+    # Simulate user click in system ui since youtube play can be initialied only
+    # by user gesture.
+    renderer_view_id = 'compositor_view_holder'
+    app_ui.WaitForUiNode(resource_id=renderer_view_id)
+    renderer_view = app_ui.GetUiNode(resource_id=renderer_view_id)
+    # Click on the top half of the renderer view to start video.
+    shifted_center = 0.5 * (
+        renderer_view.bounds.center + renderer_view.bounds.top_left)
+    renderer_view.Tap(point=shifted_center)
+
+    self._WaitForPlayTime(action_runner)
+    action_runner.EvaluateJavaScript(self.STOP_FUNCTION)
+    self._Measure(action_runner)
+
+  def _GetTimeInSeconds(self, action_runner):
+    return int(action_runner.EvaluateJavaScript(self.TIME_FUNCTION))
+
+  def _NavigateToMedia(self, action_runner):
+    pass # Users usually open youtube links directly, skip searching.