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Disable DevToolsTest.SourceMapsFromDevtools on Linux MSAN (#35263)

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This is an upstream Chromium test. Stable upstream (0.3% flake rate
over 30 days per LUCI Analysis). The test evaluates a console
expression with a sourceMappingURL comment and waits for
SourceMapWillAttach to fire within a hardcoded 20-second JS timeout.
Combined with Brave's DevTools startup overhead (chromium_src
overrides, NTP/stats services), MSAN instrumentation causes the
DevTools frontend initialization to exceed this timeout.

Not disabled by Chromium upstream. Brave modifies DevTools via
chromium_src overrides (url_constants, features, devtools_ui_controller)
which add initialization overhead. No Brave modifications to the source
map manager or test code paths.

Resolves https://github.com/brave/brave-browser/issues/53990
This commit is contained in:
Netzenbot
2026-04-04 15:51:50 -04:00
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parent 1c741efd6d
commit 8ad7d96046
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test/filters/browser_tests-linux-msan.filter
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@@ -24,6 +24,15 @@
# https://github.com/brave/brave-browser/issues/54053
-DevToolsExtensionHostsPolicyTest.CantInspectBlockedHost
# Upstream Chromium test. Stable upstream (0.3% flake rate over 30 days per
# LUCI Analysis). The test evaluates a console expression with a
# sourceMappingURL comment and waits for SourceMapWillAttach to fire within a
# hardcoded 20-second JS timeout. Combined with Brave's DevTools startup
# overhead (chromium_src overrides, NTP/stats services), MSAN instrumentation
# causes the DevTools frontend initialization to exceed this timeout.
# https://github.com/brave/brave-browser/issues/53990
-DevToolsTest.SourceMapsFromDevtools
# Upstream Chromium test. Already disabled upstream on ChromeOS MSan
# (crbug.com/491012584). Times out under MSan instrumentation because the
# kInitialWebUI feature (WebUI toolbar) navigation hangs in Brave. Upstream