Reviewed by Adam Barth.

        [Chromium] Fix relocation problem of popup window which introduces autofill popup sometimes moves to screen's top left corner.
        https://bugs.webkit.org/show_bug.cgi?id=57911
        http://code.google.com/p/chromium/issues/detail?id=78073

        Manual test added: manual-tests/autofill-popup-location.html

        Originally only height is checked so that it introduces the bug.
        So I changed it to check both width and height as size.

        * manual-tests/autofill-popup-location.html: Added.
        * platform/chromium/PopupMenuChromium.cpp:
        (WebCore::PopupContainer::refresh): Check window size between original and new before calling setFrameRect().

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83237 268f45cc-cd09-0410-ab3c-d52691b4dbfc