- Fix for <rdar://problem/4614054> REGRESSION: Safari submits forms when the Return key is hit to complete inline inputs

        * page/Frame.h: (WebCore::Frame::inputManagerHasMarkedText): Added.
        * bridge/mac/FrameMac.h: ditto.
        * bridge/mac/FrameMac.mm: (WebCore::FrameMac::inputManagerHasMarkedText): Added. Asks the input manager if there's marked text.
        * html/HTMLInputElement.cpp: (WebCore::HTMLInputElement::defaultEventHandler): For text fields, don't submit the form on Enter
        if the input manager says there's marked text.  I added this code for all text field paths.  For widgets, WebCoreTextField.mm
        has code to deal with this case.  But as we convert search, password, and isindex, they will need to do this check too.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15429 268f45cc-cd09-0410-ab3c-d52691b4dbfc