LayoutTests:

LayoutTests:

        Reviewed by Darin.

        - test case for REGRESSION: assertion failure mousing over DHTML menus at www.worldofwarcraft.com
        http://bugzilla.opendarwin.org/show_bug.cgi?id=6931

        * fast/dynamic/layer-hit-test-crash-expected.checksum: Added.
        * fast/dynamic/layer-hit-test-crash-expected.png: Added.
        * fast/dynamic/layer-hit-test-crash-expected.txt: Added.
        * fast/dynamic/layer-hit-test-crash.html: Added.

WebCore:

        Reviewed by Darin.

        - fixed REGRESSION: assertion failure mousing over DHTML menus at www.worldofwarcraft.com
        http://bugzilla.opendarwin.org/show_bug.cgi?id=6931

        * rendering/render_layer.cpp:
        (WebCore::RenderLayer::hitTestLayer): Iterate vectors in a way that won't break on empty ones.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@12513 268f45cc-cd09-0410-ab3c-d52691b4dbfc