2010-09-24 Ilya Tikhonovsky <loislo@chromium.org>

2010-09-24  Ilya Tikhonovsky  <loislo@chromium.org>

        Reviewed by Yury Semikhatsky.

        Web Inspector: CRASH at node highlight on MAC Safari.
        1) run-safari --debug
        2) open inspector
        3) open elements panel
        4) hover mouse over elements panel items multiple times
        5) CRASH
        Looks like it is a race condition. WebNodeHighlightView doesn't check
        the pointer to WebNodeHighligh object and it can be nil.

        https://bugs.webkit.org/show_bug.cgi?id=46261

        * WebInspector/WebNodeHighlightView.mm:
        (-[WebNodeHighlightView drawRect:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@68247 268f45cc-cd09-0410-ab3c-d52691b4dbfc