Refactor WPT Export to ensure only one PR in flight at a time

third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py
index f7e4d4066f3cea76d28ce884084090190a26df55..e326882dab2d264f3043ae88ec2ec75027dc3b4a 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/w3c/sync_wpt.py
@@ -52,6 +52,13 @@ def main():
         _log.info('No exportable commits found in Chromium, stopping.')
         return
 
+    if options.status:
+        return
+
+    # should no longer iterate through all of them
+    # should at most one of these per process:
+    # - create a PR
+    # - check a PR status (and merge if green)
     for commit in exportable_commits:
         _log.info('Uploading %s', chromium_wpt.subject(commit))
         chromium_commit = ChromiumCommit(host, sha=commit)
@@ -70,4 +77,5 @@ def main():
 def parse_args():
     parser = argparse.ArgumentParser(description='WPT Sync')
     parser.add_argument('--no-fetch', action='store_true')
+    parser.add_argument('--status', action='store_true')
     return parser.parse_args()