Add top level app element

appengine/swarming/elements/stats/overview-demo.json

-var data = {"status":"ok","table":{"rows":[{"c":[{"v":"Date(2016,4,13,12,10,0)"},{"v":8906},{"v":0},{"v":1799},{"v":751},{"v":108},{"v":93},{"v":89},{"v":13.253},{"v":27200.556000000004},{"v":305.62400000000002},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,9,0)"},{"v":7600},{"v":0},{"v":1804},{"v":839},{"v":193},{"v":158},{"v":96},{"v":24.395},{"v":26031.018},{"v":271.15600000000001},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,8,0)"},{"v":7236},{"v":0},{"v":1805},{"v":774},{"v":178},{"v":96},{"v":108},{"v":79.248000000000005},{"v":35097.57},{"v":324.97800000000001},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,7,0)"},{"v":7720},{"v":0},{"v":1785},{"v":735},{"v":116},{"v":102},{"v":119},{"v":39.603000000000002},{"v":39903.442999999999},{"v":335.32299999999998},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,6,0)"},{"v":8463},{"v":0},{"v":1786},{"v":1033},{"v":357},{"v":134},{"v":159},{"v":26.158999999999999},{"v":47211.47600000001},{"v":296.928},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,5,0)"},{"v":8084},{"v":0},{"v":1807},{"v":924},{"v":249},{"v":173},{"v":133},{"v":21.686},{"v":32304.577999999998},{"v":242.892},{"v":0},{"v":33}]},{"c":[{"v":"Date(2016,4,13,12,4,0)"},{"v":7358},{"v":0},{"v":1777},{"v":858},{"v":209},{"v":106},{"v":147},{"v":2.6379999999999999},{"v":31777.405999999999},{"v":216.173},{"v":0},{"v":39}]},{"c":[{"v":"Date(2016,4,13,12,3,0)"},{"v":7539},{"v":0},{"v":1795},{"v":893},{"v":246},{"v":158},{"v":104},{"v":3.9369999999999998},{"v":27389.496999999999},{"v":263.36099999999999},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,2,0)"},{"v":7269},{"v":0},{"v":1794},{"v":790},{"v":174},{"v":107},{"v":127},{"v":102.601},{"v":26771.669000000002},{"v":210.80099999999999},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,1,0)"},{"v":7079},{"v":0},{"v":1797},{"v":836},{"v":192},{"v":137},{"v":135},{"v":46.819000000000003},{"v":39934.80799999999},{"v":295.81299999999999},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,12,0,0)"},{"v":7161},{"v":0},{"v":1786},{"v":761},{"v":144},{"v":103},{"v":110},{"v":31.963000000000001},{"v":34790.026000000005},{"v":316.27300000000002},{"v":0},{"v":0}]},{"c":[{"v":"Date(2016,4,13,11,59,0)"},{"v":7392},{"v":0},{"v":1799},{"v":699},{"v":108},{"v":92},{"v":73},{"v":111.78400000000001},{"v":20858.666999999998},{"v":285.73500000000001},{"v":4},{"v":0}]},{"c":[{"v":"Date(2016,4,13,11,58,0)"},{"v":7810},{"v":0},{"v":1774},{"v":794},{"v":193},{"v":115},{"v":102},{"v":10.071999999999999},{"v":31408.812000000002},{"v":307.93000000000001},{"v":0},{"v":17}]},{"c":[{"v":"Date(2016,4,13,11,57,0)"},{"v":7406},{"v":0},{"v":1768},{"v":785},{"v":227},{"v":113},{"v":72},{"v":67.763000000000005},{"v":21639.239000000001},{"v":300.54500000000002},{"v":0},{"v":0}]}],"cols":[{"type":"datetime","id":"key","label":"Time"},{"type":"number","id":"http_requests","label":"Total HTTP requests"},{"type":"number","id":"http_failures","label":"HTTP Failures"},{"type":"number","id":"bots_active","label":"Bots active"},{"type":"number","id":"tasks_active","label":"Tasks active"},{"type":"number","id":"tasks_enqueued","label":"Tasks enqueued"},{"type":"number","id":"tasks_started","label":"Tasks started"},{"type":"number","id":"tasks_completed","label":"Tasks completed"},{"type":"number","id":"tasks_avg_pending_secs","label":"Average shard pending time (s)"},{"type":"number","id":"tasks_total_runtime_secs","label":"Tasks total runtime (s)"},{"type":"number","id":"tasks_avg_runtime_secs","label":"Average shard runtime (s)"},{"type":"number","id":"tasks_bot_died","label":"Tasks where the bot died"},{"type":"number","id":"tasks_request_expired","label":"Tasks requests expired"}]},"reqId":"0","version":"0.6"};