Convert dromaeo.domcoreattr to wprgo

Bug: 730036
Change-Id: If226169d647db5adc8714f70cef3de683591e9b2
Reviewed-on: https://chromium-review.googlesource.com/597729Reviewed-by: Helen Li <xunjieli@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#491411}

tools/perf/page_sets/data/dromaeo.domcoreattr.json

 {
     "archives": {
         "http://dromaeo.com?dom-attr": {
-            "DEFAULT": "dromaeo.domcoreattr_000.wpr"
+            "DEFAULT": "dromaeo.domcoreattr_000.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/dromaeo.domcoreattr_000.wpr.sha1

-0580ba037627ec80107c3995fe8c1ef98a22b7c6
\ No newline at end of file

tools/perf/page_sets/data/dromaeo.domcoreattr_000.wprgo.sha1

+9239635b2df78af7b7f990a314993371671fa129
\ No newline at end of file