[wpt-importer] Relax ownership requirement for finding last imported CL

The importer currently assumes the `wpt-autoroller@...` service account
owns the last imported CL. This is usually a valid assumption, but was
not for https://crrev.com/c/6635370, causing a crash when filing
follow-up bugs [0].

Assuming "Import wpt@<unique-hash>" is only ever submitted once, the
subject already uniquely identifies the desired commit, so it's safe to
drop the superfluous ownership filter.

[0]: https://logs.chromium.org/logs/infra/buildbucket/cr-buildbucket/8712322658410147937/+/u/Import_changes_from_WPT_to_Chromium/stdout

Bug: None
Change-Id: I93e6bec298e8cdaf2be6d5a90f737d6f9bcefa17
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6634777
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Auto-Submit: Jonathan Lee <jonathanjlee@google.com>
Commit-Queue: Jonathan Lee <jonathanjlee@google.com>
Cr-Commit-Position: refs/heads/main@{#1472737}
diff --git a/third_party/blink/tools/blinkpy/w3c/import_notifier.py b/third_party/blink/tools/blinkpy/w3c/import_notifier.py
index 06c373d9..8e1b045 100644
--- a/third_party/blink/tools/blinkpy/w3c/import_notifier.py
+++ b/third_party/blink/tools/blinkpy/w3c/import_notifier.py
@@ -47,7 +47,6 @@
     BuganizerIssue,
 )
 from blinkpy.w3c.common import (
-    AUTOROLLER_EMAIL,
     WPT_GH_URL,
     WPT_GH_RANGE_URL_TEMPLATE,
 )
@@ -435,7 +434,6 @@
 
     def _cl_for_wpt_revision(self, wpt_revision: str) -> GerritCL:
         query = ' '.join([
-            f'owner:{AUTOROLLER_EMAIL}',
             f'prefixsubject:"{self.IMPORT_SUBJECT_PREFIX}{wpt_revision}"',
             'status:merged',
         ])
diff --git a/third_party/blink/tools/blinkpy/w3c/import_notifier_unittest.py b/third_party/blink/tools/blinkpy/w3c/import_notifier_unittest.py
index 87fe32a..c7f47a72 100644
--- a/third_party/blink/tools/blinkpy/w3c/import_notifier_unittest.py
+++ b/third_party/blink/tools/blinkpy/w3c/import_notifier_unittest.py
@@ -207,10 +207,8 @@
 
     def _setup_import_cl(self, messages: List[str]):
         gerrit_query = (
-            'https://chromium-review.googlesource.com/changes/'
-            '?q=owner:wpt-autoroller%40chops-service-accounts.'
-            'iam.gserviceaccount.com'
-            f'+prefixsubject:"Import+wpt%40{"f" * 40}"+status:merged'
+            'https://chromium-review.googlesource.com/changes/?q='
+            f'prefixsubject:"Import+wpt%40{"f" * 40}"+status:merged'
             '&n=1&o=CURRENT_FILES&o=CURRENT_REVISION&o=COMMIT_FOOTERS'
             '&o=DETAILED_ACCOUNTS&o=MESSAGES')
         payload = {