Merge 78561 - 2011-02-15 Charlie Reis <creis@chromium.org>...

Merge 78561 - 2011-02-15  Charlie Reis  <creis@chromium.org>;

        Reviewed by Mihai Parparita.

        Crash in WebCore::FrameLoader::continueLoadAfterNavigationPolicy
        https://bugs.webkit.org/show_bug.cgi?id=54219

        Ensures we do not start a new navigation while we are in the process of
        stopping a navigation.  Also adds a manual test, since the crash can
        only be reproduced using the back button and not history.back().

        * loader/FrameLoader.cpp:
        * manual-tests/navigation-during-onload-triggered-by-back.html: Added.
        * manual-tests/resources/navigation-during-onload-container.html: Added.

BUG=72458
TBR=commit-queue@webkit.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=78564