Convert dromaeo.domcoretraverse to WPRGO

This also modifies convert_legacy_wpr_archive script to also automatically run
"git add .*wprgo" for the users upon succesful uploading.

Bug: 730036
Change-Id: I9c26a65b7ec72cd5b55136a5ef6be975caeba541
Reviewed-on: https://chromium-review.googlesource.com/598268Reviewed-by: Helen Li <xunjieli@chromium.org>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#491396}

tools/perf/convert_legacy_wpr_archive

@@ -95,7 +95,10 @@ def upload(page_sets_json_file, bucket):
         count += 1
     print "successfully upload %d wprgo files in %s to buckets: %s\n" % (count,
         page_sets_json_file, bucket)
-    print "remember to run \"git add *.wprgo.sha1\" to include them in your CL\n"
+    print ('Also run \"git add *.wprgo.sha1\" to include them in your CL? '
+           '(Press Enter to continue or ctrl+C to skip this step)\n')
+    raw_input()
+    subprocess.check_call(['git', 'add', '*.wprgo.sha1'])
 
 def GetStorySet(benchmark):
   # Create a dummy options object which hold default values that are expected

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

 {
     "archives": {
         "http://dromaeo.com?dom-traverse": {
-            "DEFAULT": "dromaeo.domcoretraverse_000.wpr"
+            "DEFAULT": "dromaeo.domcoretraverse_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.domcoretraverse_000.wpr.sha1

-160f6c326f172d89eeabf88ada5129f36c2230b1
\ No newline at end of file

tools/perf/page_sets/data/dromaeo.domcoretraverse_000.wprgo.sha1

+dbd4dd2d6b354a9a1f689d58df32200e9d294821
\ No newline at end of file