WebCore:

WebCore:

        Reviewed by Adam

        http://bugs.webkit.org/show_bug.cgi?id=15976 - ASSERT/crash when SQLTransactionCallback throws an exception

        * storage/SQLTransaction.cpp:
        (WebCore::SQLTransaction::deliverTransactionCallback): Make a transaction error for the case where the
          SQLTransactionCallback fails
        (WebCore::SQLTransaction::deliverTransactionErrorCallback): Don't assert on the error callback, but null check it
          and make the commit/rollback decision accordingly

LayoutTests:

        Reviewed by Adam

        Fix for http://bugs.webkit.org/show_bug.cgi?id=15976

        * storage: Added - There will soon be an entire suite in here!
        * storage/transaction_callback_exception_crash-expected.txt: Added.
        * storage/transaction_callback_exception_crash.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@27784 268f45cc-cd09-0410-ab3c-d52691b4dbfc