Add System health stories for Emerging market

tools/perf/page_sets/system_health/blank_stories.py

Index: tools/perf/page_sets/system_health/blank_stories.py
diff --git a/tools/perf/page_sets/system_health/blank_stories.py b/tools/perf/page_sets/system_health/blank_stories.py
index ffe0eccf0836c7361b43a7609799fef16ad520df..291c4eae2b0c11c910178d98a826f612f7e922f0 100644
--- a/tools/perf/page_sets/system_health/blank_stories.py
+++ b/tools/perf/page_sets/system_health/blank_stories.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 from page_sets.system_health import system_health_story
+from page_sets.system_health import platforms
 
 
 class BlankAboutBlankStory(system_health_story.SystemHealthStory):
@@ -23,3 +24,21 @@ class BlankAboutBlankStory(system_health_story.SystemHealthStory):
         """
     )
     action_runner.WaitForJavaScriptCondition("window.__hasRunRAF")
+
+
+class MobileNewTabPageStory(system_health_story.SystemHealthStory):
+  """Story that loads new tab page and opens menu."""
+
+  NAME = 'blank:about:newtab'

[perezju, 2017/03/31 08:45:54]

I don't think this is a "blank" story, it's actually hopping for content to get
loaded.

Maybe this could be browse:chrome:newtab?

[ssid, 2017/04/04 03:43:48]

Done.

+  URL = 'chrome://newtab'
+
+  def RunPageInteractions(self, action_runner):
+    package = action_runner.tab.browser.GetBrowserInfo().package_name
+    platform = action_runner.tab.browser.platform
+    menu_button = package+':id/menu_button'
+    platform.system_ui.WaitForUiNode(resource_id=menu_button)
+    menu_button = platform.system_ui.GetUiNode(resource_id=menu_button)
+    menu_button.Tap()
+    platform.system_ui.WaitForUiNode(resource_id=package+':id/menu_item_text')
+
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY