Add Multi-tab System Health Story

tools/perf/page_sets/data/system_health_desktop.json

 {
     "archives": {
         "browse:media:imgur": {
             "DEFAULT": "system_health_desktop_025.wpr"
         },
         "browse:media:pinterest": {
             "DEFAULT": "system_health_desktop_035.wpr"
         },
         "browse:media:tumblr": {
             "DEFAULT": "system_health_desktop_036.wpr"
@@ skipping 153 matching lines @@
         },
         "load:tools:weather": {
             "DEFAULT": "system_health_desktop_004.wpr"
         },
         "long_running:tools:gmail-background": {
             "DEFAULT": "system_health_desktop_028.wpr"
         },
         "long_running:tools:gmail-foreground": {
             "DEFAULT": "system_health_desktop_028.wpr"
         },
+        "multitab:typical24:typical24": {
+            "DEFAULT": "system_health_desktop_048.wpr"

[nednguyen, 2017/03/02 13:24:39]

You need to also upload system_health_desktop_048.wpr.sha1 file to cloud
storage.

Command:
https://www.chromium.org/developers/telemetry/upload_to_cloud_storage#TOC-Upl...

Just want to make sure, did you get the PRESUBMIT check that warn about there is
no entry for system_health_desktop_048.wpr?

[nednguyen, 2017/03/02 13:30:15]

Err, my bad. Upload system_health_desktop_048.wpr to cloud storage & git add
system_health_desktop_048.wpr.sha1 

[vovoy, 2017/03/02 18:02:29]

OK, I will upload the wpr and git add wpr.sha1 for review.

+        },
         "play:media:google_play_music": {
             "DEFAULT": "system_health_desktop_030.wpr"
         },
         "play:media:pandora": {
             "DEFAULT": "system_health_desktop_032.wpr"
         },
         "play:media:soundcloud": {
             "DEFAULT": "system_health_desktop_030.wpr"
         },
         "search:portal:google": {
             "DEFAULT": "system_health_desktop_022.wpr"
         }
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",
     "platform_specific": true
-}
+}