Reviewed by Maciej Stachowiak.

    Reviewed by Maciej Stachowiak.

        - Fixed <rdar://problem/5049509> REGRESSION(10.4.9-9A377a): REAP Suite
        installer shows empty modal alert window (hangs) if user cancels during
        "installing shared components" phase

        Added Adobe installers to the family of apps that need a data load
        loading quirk.

        Added a linked-on-or-after check because this code is no longer
        Tiger-only.

        I tested this code on Tiger and Leopard.

        * Misc/WebKitVersionChecks.h:
        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebDocumentLoaderMac.mm:
        (needsDataLoadWorkaround):
        (WebDocumentLoaderMac::setDataSource):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@24183 268f45cc-cd09-0410-ab3c-d52691b4dbfc