http://chromegw.corp.google.com/i/chromium.webkit/builders/Webkit%20Mac10.7/builds/2232 Maybe not new just failing from its start.
First failing run: http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.7/builds/2008 Looks like this has been failing on this bot since the test landed: [----------] 1 test from ScrollbarLayerChromiumTest [ RUN ] ScrollbarLayerChromiumTest.resolveScrollLayerPointer 0 webkit_unit_tests 0x005e909a webkit_unit_tests + 5468314 1 webkit_unit_tests 0x00608191 webkit_unit_tests + 5595537 2 libsystem_c.dylib 0x93db259b _sigtramp + 43 3 ??? 0xffffffff 0x0 + 4294967295 4 webkit_unit_tests 0x0117d685 webkit_unit_tests + 17610373 5 webkit_unit_tests 0x0117d0ed webkit_unit_tests + 17608941 6 webkit_unit_tests 0x010abb85 webkit_unit_tests + 16751493 7 webkit_unit_tests 0x004b11c4 webkit_unit_tests + 4190660 8 webkit_unit_tests 0x005d2250 webkit_unit_tests + 5374544 9 webkit_unit_tests 0x005caed7 webkit_unit_tests + 5344983 10 webkit_unit_tests 0x005cb2b3 webkit_unit_tests + 5345971 11 webkit_unit_tests 0x005cb6b8 webkit_unit_tests + 5347000 12 webkit_unit_tests 0x005d0098 webkit_unit_tests + 5365912 13 webkit_unit_tests 0x005d27b0 webkit_unit_tests + 5375920 14 webkit_unit_tests 0x005cfc62 webkit_unit_tests + 5364834 15 webkit_unit_tests 0x0061e222 webkit_unit_tests + 5685794 16 webkit_unit_tests 0x000cc443 webkit_unit_tests + 107587 17 webkit_unit_tests 0x000cc3e2 webkit_unit_tests + 107490 ax: 6c226ae4, bx: 6c226ae4, cx: 6c229ca0, dx: 93dd6361
The test seems fine on the 10.5/10.6 bots. I can try to repro on my Lion mac pro tomorrow. Very strange!
Marked LayoutTest bugs, bugs with Chromium IDs, and some others as WontFix. Test failure bugs still are trackable via TestExpectations or disabled unit tests.