Add support for retrieving pid for Edge - #60811

[taskcluster 2026-06-25 02:20:57.395Z] Task ID: J0XAI1mKSNy-krXgw7I0lg
[taskcluster 2026-06-25 02:20:57.395Z] Worker ID: 6128991993110540649
[taskcluster 2026-06-25 02:20:57.395Z] Worker Group: us-central1-f
[taskcluster 2026-06-25 02:20:57.395Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-06-25 02:20:57.395Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-06-25 02:20:57.395Z] Worker Version: 46.1.0
[taskcluster 2026-06-25 02:20:57.395Z] Public IP: 35.202.30.128
[taskcluster 2026-06-25 02:20:57.395Z] Hostname: proj-wpt-ci-dfilh9pztquf1cgw12coka

[taskcluster 2026-06-25 02:20:58.449Z] === Task Starting ===
+ '[' '' ']'
+ '[' -d /etc/profile.d ']'
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/01-locale-fix.sh ']'
+ . /etc/profile.d/01-locale-fix.sh
+++ /usr/bin/locale-check C.UTF-8
++ eval
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/apps-bin-path.sh ']'
+ . /etc/profile.d/apps-bin-path.sh

...(270 lines hidden)...

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Warning: could not load product 'firefox' for argument registration: No module named 'mozleak'
Warning: could not load product 'firefox_android' for argument registration: No module named 'mozrunner'
 0:00.00 INFO Set tests_root to /home/test/web-platform-tests
 0:00.00 INFO Set metadata_root to /home/test/web-platform-tests
 0:00.00 INFO Set manifest_update to True
 0:00.00 INFO Set manifest_download to True
mem avail: 14604 of 15806 MiB (92.40%), swap free:    0 of    0 MiB ( 0.00%)
 0:41.72 INFO Identified 0 affected tests
 0:41.72 INFO Using certutil /usr/bin/certutil
 0:41.72 INFO Downloading geckodriver
 0:41.72 INFO Attempting to install webdriver from nightly
 0:42.17 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:42.17 INFO Installed b'geckodriver 0.37.0 (f7f8e60b2f7e 2026-06-09 06:19 +0000)'
 0:43.35 INFO Getting profile data from git ref main
 0:43.94 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/nightly/154.0a1
 0:43.94 INFO Downloading OpenH264 plugin
 0:45.02 INFO Downloading openh264.json from git ref main
 0:45.15 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:45.38 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:45.38 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1947] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:45.44 INFO :::
 0:45.44 INFO ::: Running test verification step "Running tests in a loop with restarts 10 times"...
 0:45.44 INFO :::
 0:45.44 mozversion INFO application_buildid: 20260624063255
 0:45.45 mozversion INFO application_changeset: 59c4db236739bbd8b00421c83e0b3c5a08f66bcc
 0:45.45 mozversion INFO application_display_name: Firefox Nightly
 0:45.45 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:45.45 mozversion INFO application_name: Firefox
 0:45.45 mozversion INFO application_remotingname: firefox-nightly
 0:45.45 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:45.45 mozversion INFO application_vendor: Mozilla
 0:45.45 mozversion INFO application_version: 154.0a1
 0:45.45 mozversion INFO platform_buildid: 20260624063255
 0:45.45 mozversion INFO platform_changeset: 59c4db236739bbd8b00421c83e0b3c5a08f66bcc
 0:45.45 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:45.45 mozversion INFO platform_version: 154.0a1
 0:55.54 INFO Installed font: Ahem.ttf
 0:56.61 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:56.66 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:56.75 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:56.77 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:56.78 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:56.80 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:56.80 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:56.80 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:56.81 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.82 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.82 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:56.83 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:56.83 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.83 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.83 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:56.90 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:57.85 INFO Repetition 1 / 10
 0:57.85 SUITE_START: web-platform-test - running 0 tests
 0:57.85 INFO Using 1 child processes
 0:57.85 INFO No more tests
 0:57.85 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 0 checks ()
Expected results: 0
Unexpected results: 0
OK
 0:57.85 INFO Got 0 unexpected results, with 0 unexpected passes
 0:57.86 INFO STDERR: Exception in thread 
 0:57.86 INFO STDERR: TestRunnerManager-0
 0:57.86 wptserve INFO Stopped http server on 127.0.0.1:8001
 0:57.86 wptserve INFO Stopped http server on 127.0.0.1:8000
 0:57.86 wptserve INFO Stopped http server on 127.0.0.1:8002
 0:57.87 wptserve INFO Stopped http server on 127.0.0.1:8003
 0:57.88 wptserve INFO Stopped http server on 127.0.0.1:8443
 0:57.88 wptserve INFO Stopped http server on 127.0.0.1:8444
 0:57.88 wptserve INFO Stopped http server on 127.0.0.1:8445
 0:57.88 wptserve INFO Stopped http server on 127.0.0.1:8446
 0:57.88 INFO STDERR: :
 0:57.88 INFO STDERR: Traceback (most recent call last):
 0:57.88 INFO STDERR:   File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
 0:57.88 INFO STDERR:     
 0:57.88 INFO STDERR: self.run()
 0:57.88 INFO STDERR:   File "/usr/lib/python3.10/threading.py", line 953, in run
 0:57.88 INFO STDERR:     
 0:57.88 INFO STDERR: self._target(*self._args, **self._kwargs)
 0:57.88 INFO STDERR:   File "/home/test/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py", line 497, in run_loop
 0:57.88 INFO STDERR:     
 0:57.88 INFO STDERR: self._cleanup_run_loop()
 0:57.88 INFO STDERR:   File "/home/test/web-platform-tests/tools/wptrunner/wptrunner/testrunner.py", line 505, in _cleanup_run_loop
 0:57.88 INFO STDERR:     
 0:57.88 INFO STDERR: while current_group.test_queue is not None and len(current_group.test_queue) > 0:
 0:57.88 INFO STDERR: AttributeError
 0:57.88 INFO STDERR: : 
 0:57.88 INFO STDERR: 'NoneType' object has no attribute 'test_queue'
 0:57.88 wptserve INFO Stopped http server on 127.0.0.1:9000
 0:57.89 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:58.35 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:58.35 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:58.42 INFO Removed font: Ahem.ttf
 0:58.45 INFO Closing logging queue
 0:58.45 INFO queue closed
 0:58.45 INFO No tests ran
 0:58.45 INFO ::: Ran 1 of expected 10 iterations.
 0:58.45 INFO ## All results ##

 0:58.45 INFO ::: Running tests in a loop with restarts 10 times : PASS *  1/10 repeats completed
 0:58.45 INFO :::
 0:58.45 INFO ::: Test verification PASS
 0:58.45 INFO :::
[taskcluster 2026-06-25 02:23:14.553Z] === Task Finished ===
[taskcluster 2026-06-25 02:23:14.918Z] Successful task run with exit code: 0 completed in 137.524 seconds