http/tests/inspector/extensions-headers.html and http/tests/inspector/extensions-resources-redirect.html have been failing on SnowLeopard Intel Release (WebKit2 Tests) since r89657.
I am going to add these tests to the mac-wk2 skipped list to get the bots green.
Added to the mac-wk2 skipped list in http://trac.webkit.org/changeset/89674.
I wonder if bug 63178 will fix this? See also bug 57491.
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests.
Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.