databaseChanged notifications were being sent out on the database thread - they need to be on the main thread
        like all other notifications we send out!

        * platform/SecurityOriginData.cpp:
        (WebCore::SecurityOriginData::copy): Add a deep copy method, for when an object thread hops
        * platform/SecurityOriginData.h:

        * storage/DatabaseTracker.cpp:
        (WebCore::notificationMutex):
        (WebCore::notificationQueue):
        (WebCore::DatabaseTracker::scheduleNotifyDatabaseChanged): Add the origin/name pair to a queue
        (WebCore::DatabaseTracker::scheduleForNotification): Schedule to deliver this queue of notifications
          on the main thread
        (WebCore::DatabaseTracker::notifyDatabasesChanged): Deliver all notifications in the queue
        * storage/DatabaseTracker.h:

        * storage/SQLTransaction.cpp:
        (WebCore::SQLTransaction::postflightAndCommit): scheduleNotifyDatabaseChanged() instead of "notify now!"
        (WebCore::SQLTransaction::cleanupAfterTransactionErrorCallback): Ditto



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@28322 268f45cc-cd09-0410-ab3c-d52691b4dbfc