Fix Linux CI: add --no-zygote to bypass zygote FD-passing failure

The zygote process fails to pass shared-memory file descriptors
(global descriptor 7) to renderer subprocesses in GitHub Actions
CI containers. --disable-dev-shm-usage alone doesn't help because
the zygote's FD-passing mechanism runs before that flag is processed.
--no-zygote makes CEF launch renderers directly from the browser
process, bypassing the broken path entirely.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

unittests/main_test.py

@@ -154,6 +154,9 @@ def test_main(self):
             # reduces startup time and avoids GPU process launch failures.
             switches["disable-gpu"] = ""
             switches["disable-gpu-compositing"] = ""
+            # Zygote FD-passing fails in CI containers; launch renderers
+            # directly from the browser process instead.
+            switches["no-zygote"] = ""
         cef.Initialize(settings, switches=switches)
         subtest_message("cef.Initialize() ok")
 

unittests/osr_test.py

@@ -119,6 +119,9 @@ def test_osr(self):
             # /dev/shm is too small in CI containers; renderer subprocess
             # fails shared-memory descriptor lookup (global descriptor 7).
             switches["disable-dev-shm-usage"] = ""
+            # Zygote FD-passing fails in CI containers; launch renderers
+            # directly from the browser process instead.
+            switches["no-zygote"] = ""
         browser_settings = {
             # Tweaking OSR performance (Issue #240)
             "windowless_frame_rate": 30,  # Default frame rate in CEF is 30