[system health] Add media browsing stories.

tools/perf/page_sets/data/system_health_desktop.json

 {
     "archives": {
         "system_health_desktop_000.wpr": [
             "load:search:amazon",
             "load:search:flipkart",
             "load:search:ebay",
             "load:search:google",
             "load:search:yandex",
             "load:search:taobao",
             "load:search:yahoo",
@@ skipping 67 matching lines @@
             "load:social:twitter"
         ],
         "system_health_desktop_019.wpr": [
             "browse:social:twitter"
         ],
         "system_health_desktop_020.wpr": [
             "load:news:flipboard"
         ],
         "system_health_desktop_021.wpr": [
             "browse:news:flipboard"
+        ],
+        "system_health_desktop_024.wpr": [
+            "load:media:imgur"

[petrcermak, 2016/08/04 13:32:42]

I suggest you move this (manually - I know that the description says you
shouldn't do it) under system_health_desktop_025.wpr and delete
system_health_desktop_024.wpr altogether. That way, both the browsing and
loading will have exactly the same condition (better for comparison).

[Hannes Payer (out of office), 2016/08/05 10:21:05]

Done.

+        ],
+        "system_health_desktop_025.wpr": [
+            "browse:media:imgur"
+        ],
+        "system_health_desktop_026.wpr": [
+            "browse:media:youtube"
         ]
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating."
 }