2010-06-17 Abhishek Arya <inferno@chromium.org>

2010-06-17  Abhishek Arya  <inferno@chromium.org>

        Reviewed by David Kilzer.

        (Landed by Dirk Pranke).

        Check for a null frame before setting drag selection.
        https://bugs.webkit.org/show_bug.cgi?id=38893
        Same Layout test as https://bugs.webkit.org/show_bug.cgi?id=37168.

        Test: editing/pasteboard/drag-drop-iframe-refresh-crash.html

        Note that you need to run the test manually 20-30 times for the crash
        to reproduce.

        * editing/SelectionController.cpp:
        (WebCore::SelectionController::setSelection):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@61365 268f45cc-cd09-0410-ab3c-d52691b4dbfc