Reviewed by Tony Chang.

        IndexedDB: Prepare for running layout tests with LevelDB
        https://bugs.webkit.org/show_bug.cgi?id=63593

        Migration of data from SQLite to LevelDB must be done before the
        m_backingStore map is checked for an open LevelDB, because if a
        previous layout test has used LevelDB, it will be in the
        m_backingStore map.

        Covered by existing layout tests.

        * storage/IDBFactoryBackendImpl.cpp:
        (WebCore::IDBFactoryBackendImpl::open):
2011-06-28  Hans Wennborg  <hans@chromium.org>

        Reviewed by Tony Chang.

        IndexedDB: Prepare for running layout tests with LevelDB
        https://bugs.webkit.org/show_bug.cgi?id=63593

        WebIDBFactory should decide what DefaultBackingStore means.
        Also fix handling of layout test and incognito mode properly.

        * src/WebIDBFactoryImpl.cpp:
        (WebKit::WebIDBFactoryImpl::open):
2011-06-28  Hans Wennborg  <hans@chromium.org>

        Reviewed by Tony Chang.

        IndexedDB: Prepare for running layout tests with LevelDB
        https://bugs.webkit.org/show_bug.cgi?id=63593

        The TestShell must always provide a temporary folder for LevelDB,
        not just when the backing store type is overridden.

        * DumpRenderTree/chromium/LayoutTestController.cpp:
        (LayoutTestController::setOverrideIndexedDBBackingStore):
        (LayoutTestController::clearAllDatabases):
        * DumpRenderTree/chromium/LayoutTestController.h:
        * DumpRenderTree/chromium/TestShell.cpp:
        (TestShell::TestShell):
        * DumpRenderTree/chromium/TestShell.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@90137 268f45cc-cd09-0410-ab3c-d52691b4dbfc