Reviewed by Chris.

    Reviewed by Chris.

        - WebCore part of fix for <rdar://problem/3980651> REGRESSION (125-180): Huge number of pages printed from certain page,
        iFrame involved

        This also fixes the problems with printing from GMail, yay!

        * khtml/rendering/render_flow.cpp:
        (RenderFlow::paintLines):
        If the current line is taller than the entire page height (e.g. tall iFrame), don't try
        to avoid splitting it across pages.

        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge computePageRectsWithPrintWidthScaleFactor:printHeight:]):
        Handle error cases in a more obvious manner; this will cause future problems like this
        to print a blank page and complain to the console on debug builds, rather than print a
        zillionty mostly-blank pages.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8509 268f45cc-cd09-0410-ab3c-d52691b4dbfc