Add loading mobile benchmark (but disable it)

tools/perf/page_sets/data/loading_mobile.json

+{
+    "archives": {
+        "loading_mobile_000.wpr": [
+            "http://www.163.com",
+            "http://www.futura-sciences.com",
+            "http://www.gfk.com",
+            "http://enquiry.indianrail.gov.in/mntes/MntesServlet?action=MainMenu&subAction=excep&excpType=EC",
+            "http://www.slideshare.net",
+            "https://mobile.twitter.com/scottjehl/status/760618697727803394",
+            "http://www.amazon.com/gp/aw/s/ref=is_s/189-8585431-1246432?k=shoes",
+            "http://www.dawn.com",
+            "https://2048-opera-pwa.surge.sh/",
+            "http://www.hashocean.com",
+            "http://olx.co.id/iklan/iphone-6s-64-rose-gold-warna-favorite-IDiSdm5.html#5310a118c3;promoted",
+            "https://smp.suumo.jp/mansion/tokyo/sc_104/cond/?moreCond=1",
+            "http://www.58pic.com",
+            "http://www.locanto.in",
+            "http://www.hongkiat.com",
+            "http://www.dramaq.com.tw",
+            "https://dev.opera.com/",
+            "https://www.google.com.br/search?q=flor#q=Entrega+de+flores&start=10",
+            "http://www.ebs.in",
+            "http://www.thestar.com.my",
+            "https://townwork.net",
+            "https://jakearchibald.github.io/trained-to-thrill/",
+            "https://www.pokedex.org/",
+            "http://www.mlsmatrix.com",
+            "http://www.bradesco.com.br",
+            "https://www.google.com/search?q=flower#q=flower+delivery",
+            "https://m.facebook.com/?soft=messages",
+            "http://m.kapanlagi.com/lirik/artis/anji/kata_siapa/",
+            "http://www.francetvinfo.fr",
+            "https://www.google.co.id/#q=pengiriman+bunga",
+            "http://www.thairath.co.th",
+            "http://g1.globo.com/politica/noticia/2016/02/maioria-do-stf-autoriza-fisco-obter-dados-bancarios-sem-decisao-judicial.html",
+            "https://www.youtube.com/watch?v=MU3YuvNRhVY",
+            "http://m.tribunnews.com/superskor/2016/08/03/ribuan-polisi-dikerahkan-mengawal-bonek",
+            "http://xw.qq.com/news/20160803025029/NEW2016080302502901",
+            "http://www.localmoxie.com",
+            "https://www.google.co.in/search?q=%E0%A4%AB%E0%A5%82%E0%A4%B2&rct=j#q=%E0%A4%AB%E0%A5%82%E0%A4%B2+%E0%A4%B5%E0%A4%BF%E0%A4%A4%E0%A4%B0%E0%A4%A3",
+            "https://guitar-tuner.appspot.com",
+            "http://www.ibicn.com",
+            "http://noticias.bol.uol.com.br/ultimas-noticias/brasil/2016/08/03/tufao-nida-nao-deixa-vitimas-mas-prejuizos-de-us-43-milhoes.htm",
+            "http://www.sbs.co.kr",
+            "http://m.kaskus.co.id/thread/57a03a3214088d91068b4567/inilah-akibat-bersikap-overprotektif-terhadap-anak/?ref=homelanding&med=hot_thread",
+            "https://en.m.wikipedia.org/wiki/Solo_Foods",
+            "http://www.gsshop.com",
+            "https://m.baidu.com/s?word=%E9%B2%9C%E8%8A%B1%E9%80%9F%E9%80%92&oq=%E9%B2%9C%E8%8A%B1",
+            "https://andreasbovens.github.io/inbox-attack/",
+            "http://news.yahoo.com/were-top-10-most-visited-us-national-parks-105323727.html",
+            "https://www.flipkart.com/big-wing-casuals/p/itmemeageyfn6m9z?lid=LSTSHOEMEAGURG2PHPW18FTBN&pid=SHOEMEAGURG2PHPW",
+            "https://voice-memos.appspot.com",
+            "https://flipboard.com/topic/yoga"
+        ],
+        "loading_mobile_001.wpr": [
+            "http://www.dailymotion.com/video/x3d1kj5_fallout-4-review_videogames"
+        ]
+    },
+    "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating."
+}