Reviewed by Ryosuke Niwa.

        SUPPORT_AUTOCORRECTION_PANEL should be USE(AUTOCORRECTION_PANEL)
        https://bugs.webkit.org/show_bug.cgi?id=61181

        - Removed SUPPORT_AUTOCORRECTION_PANEL and REMOVE_MARKERS_UPON_EDITING from SpellingCorrectionController.h
        - Define WTF_USE_UNIFIED_TEXT_CHECKING and WTF_USE_AUTOMATIC_TEXT_REPLACEMENT at TextChecking.h

        No new tests. Just renaming a compilation conditional.

        * editing/Editor.cpp:
        (WebCore::Editor::markAllMisspellingsAndBadGrammarInRanges):
        * editing/SpellingCorrectionCommand.cpp:
        (WebCore::SpellingCorrectionCommand::doApply):
        * editing/SpellingCorrectionController.cpp:
        * editing/SpellingCorrectionController.h:
        (WebCore::SpellingCorrectionController::shouldRemoveMarkersUponEditing):
        * loader/EmptyClients.h:
        * page/EditorClient.h:
        * platform/text/TextChecking.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@87117 268f45cc-cd09-0410-ab3c-d52691b4dbfc