Migrate key_desktop_move_cases to WPRGo

BUG=756002

Change-Id: I1bed16c5636231f948e841ab704ae74935865128
Reviewed-on: https://chromium-review.googlesource.com/685794Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Tien-Ren Chen <trchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504499}

tools/perf/page_sets/data/key_desktop_move_cases.json

 {
     "archives": {
         "Maps": {
-            "DEFAULT": "key_desktop_move_cases_000.wpr"
+            "DEFAULT": "key_desktop_move_cases_000.wprgo"
         },
         "https://mail.google.com/mail/": {
-            "DEFAULT": "key_desktop_move_cases_002.wpr"
+            "DEFAULT": "key_desktop_move_cases_002.wprgo"
         }
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",

tools/perf/page_sets/data/key_desktop_move_cases_000.wpr.sha1

-7982d4d8661f8e7bf33e4c4a68e41dd3b8dc7661
\ No newline at end of file

tools/perf/page_sets/data/key_desktop_move_cases_000.wprgo.sha1

+26fe310f8a67bbbd91848cfbd260442285c91468
\ No newline at end of file

tools/perf/page_sets/data/key_desktop_move_cases_002.wpr.sha1

-2f03166ecdd325bacaf5ce2ab411d5f533d1b67a
\ No newline at end of file

tools/perf/page_sets/data/key_desktop_move_cases_002.wprgo.sha1

+ef581f08a71089465e81b6fe4bc72e6ddde33766
\ No newline at end of file