Reviewed by Hyatt.

    Reviewed by Hyatt.
        Tweaked and landed by Darin.

        http://bugzilla.opendarwin.org/show_bug.cgi?id=10399
        Bug 10399: RenderTextArea is unused

        * WebCore.vcproj/WebCore/WebCore.vcproj:
        * WebCore.xcodeproj/project.pbxproj:
        * WebCoreSources.bkl:
        Removed RenderTextArea source files.

        * html/HTMLTextAreaElement.cpp: Removed include of RenderTextArea.h.
        * html/HTMLTextAreaElement.h: Removed forward declaration of RenderTextArea.

        * platform/mac/WidgetMac.mm: (WebCore::Widget::paint): Updated a comment.

        * platform/TextBox.h: Removed.
        * platform/mac/TextBoxMac.mm: Removed.
        * platform/mac/WebCoreTextArea.h: Removed.
        * platform/mac/WebCoreTextArea.mm: Removed.
        * rendering/RenderTextArea.cpp: Removed.
        * rendering/RenderTextArea.h: Removed.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@15879 268f45cc-cd09-0410-ab3c-d52691b4dbfc