Add System health stories for Emerging market

tools/perf/page_sets/system_health/loading_stories.py

Index: tools/perf/page_sets/system_health/loading_stories.py
diff --git a/tools/perf/page_sets/system_health/loading_stories.py b/tools/perf/page_sets/system_health/loading_stories.py
index f3ab950d6bcff18cdc81910a676a3992f380800f..5a58a8edb59757f5d6dea39ade4af77d78a891e8 100644
--- a/tools/perf/page_sets/system_health/loading_stories.py
+++ b/tools/perf/page_sets/system_health/loading_stories.py
@@ -71,6 +71,20 @@ class LoadEbayStory(_LoadingStory):
   URL = 'https://www.ebay.com/sch/i.html?_nkw=headphones'
 
 
+class BrowserAvito(_LoadingStory):
+  NAME = 'load:shopping:avito'
+  URL = 'https://m.avito.ru/rossiya'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadOLX(_LoadingStory):
+  NAME='load:shopping:olx'
+  URL='http://m.olx.co.id'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
 ################################################################################
 # Social networks.
 ################################################################################
@@ -142,6 +156,7 @@ class LoadFlipboardStory(_LoadingStory):
 class LoadHackerNewsStory(_LoadingStory):
   NAME = 'load:news:hackernews'
   URL = 'https://news.ycombinator.com'
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadNytimesDesktopStory(_LoadingStory):
@@ -208,6 +223,42 @@ class LoadWashingtonPostMobileStory(_LoadingStory):
 class LoadWikipediaStory(_LoadingStory):
   NAME = 'load:news:wikipedia'
   URL = 'https://en.wikipedia.org/wiki/Science'
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadCricBuzz(_LoadingStory):
+  NAME='load:news:cricbuzz'
+  URL='http://m.cricbuzz.com'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadIrctc(_LoadingStory):
+  NAME='load:news:irctc'
+  URL='https://www.irctc.co.in'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadTOI(_LoadingStory):
+  NAME='load:news:toi'
+  URL='http://m.timesofindia.com'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadGlobo(_LoadingStory):
+  NAME='load:news:globo'
+  URL='http://www.globo.com/'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
+
+
+class LoadPolymer(_LoadingStory):
+  NAME='load:news:polymer'
+  URL='https://polymer-news.appspot.com/'
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
+  TAGS = [story_tags.EMERGING_MARKET]
 
 
 ################################################################################
@@ -331,11 +382,6 @@ class LoadGmailMobileStory(_LoadGmailBaseStory):
     action_runner.WaitForJavaScriptCondition(
         'document.getElementById("apploadingdiv").style.height === "0px"')
 
-class LoadMapsStory(_LoadingStory):
-  NAME = 'load:tools:maps'
-  URL = 'https://www.google.com/maps/place/London,+UK/'
-
-
 class LoadStackOverflowStory(_LoadingStory):
   NAME = 'load:tools:stackoverflow'
   URL = (