Reviewed by Maciej Stachowiak.

        Factor RedirectScheduler out of FrameLoader
        https://bugs.webkit.org/show_bug.cgi?id=29948

        This change introduces a new sub-object of Frame, redirectScheduler.
        The redirectScheduler is responsible for scheduling redirects.

        This change leaves the code for the redirectScheduler in
        FrameLoader.cpp.  A future change will move the class into its own
        file.

        No behavior change (hopefully!).

        * loader/FrameLoader.cpp:
        (WebCore::RedirectScheduler::RedirectScheduler):
        (WebCore::RedirectScheduler::~RedirectScheduler):
        (WebCore::RedirectScheduler::redirectScheduledDuringLoad):
        (WebCore::RedirectScheduler::clear):
        (WebCore::FrameLoader::FrameLoader):
        (WebCore::FrameLoader::setDefersLoading):
        (WebCore::FrameLoader::stopLoading):
        (WebCore::FrameLoader::didOpenURL):
        (WebCore::FrameLoader::didExplicitOpen):
        (WebCore::FrameLoader::cancelAndClear):
        (WebCore::FrameLoader::clear):
        (WebCore::FrameLoader::checkCompleted):
        (WebCore::FrameLoader::isScheduledLocationChangePending):
        (WebCore::FrameLoader::scheduleHTTPRedirection):
        (WebCore::RedirectScheduler::scheduleRedirect):
        (WebCore::RedirectScheduler::mustLockBackForwardList):
        (WebCore::FrameLoader::scheduleLocationChange):
        (WebCore::RedirectScheduler::scheduleLocationChange):
        (WebCore::FrameLoader::scheduleFormSubmission):
        (WebCore::RedirectScheduler::scheduleFormSubmission):
        (WebCore::FrameLoader::scheduleRefresh):
        (WebCore::RedirectScheduler::scheduleRefresh):
        (WebCore::RedirectScheduler::locationChangePending):
        (WebCore::FrameLoader::scheduleHistoryNavigation):
        (WebCore::RedirectScheduler::scheduleHistoryNavigation):
        (WebCore::RedirectScheduler::timerFired):
        (WebCore::FrameLoader::provisionalLoadStarted):
        (WebCore::RedirectScheduler::schedule):
        (WebCore::RedirectScheduler::startTimer):
        (WebCore::RedirectScheduler::cancel):
        (WebCore::FrameLoader::completed):
        (WebCore::FrameLoader::open):
        * loader/FrameLoader.h:
        (WebCore::FrameLoader::committedFirstRealDocumentLoad):
        * page/Frame.cpp:
        (WebCore::Frame::Frame):
        (WebCore::Frame::redirectScheduler):
        * page/Frame.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@48958 268f45cc-cd09-0410-ab3c-d52691b4dbfc