Introduce Position::inDocument()

Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 2080 matching lines @@
 
         // Don't check spelling and grammar if the change of selection is triggered by spelling correction itself.
         bool shouldCheckSpellingAndGrammar = !(options & FrameSelection::SpellCorrectionTriggered);
 
         // When typing we check spelling elsewhere, so don't redo it here.
         // If this is a change in selection resulting from a delete operation,
         // oldSelection may no longer be in the document.
         if (shouldCheckSpellingAndGrammar
             && closeTyping
             && oldSelection.isContentEditable()
-            && oldSelection.start().deprecatedNode()
-            && oldSelection.start().anchorNode()->inDocument()
+            && oldSelection.start().inDocument()
             && !isSelectionInTextField(oldSelection)) {
             spellCheckOldSelection(oldSelection, newAdjacentWords, newSelectedSentence);
         }
 
         if (textChecker().shouldEraseMarkersAfterChangeSelection(TextCheckingTypeSpelling)) {
             if (RefPtr<Range> wordRange = newAdjacentWords.toNormalizedRange())
                 m_frame->document()->markers()->removeMarkers(wordRange.get(), DocumentMarker::Spelling);
         }
         if (textChecker().shouldEraseMarkersAfterChangeSelection(TextCheckingTypeGrammar)) {
             if (RefPtr<Range> sentenceRange = newSelectedSentence.toNormalizedRange())
@@ skipping 95 matching lines @@
     return WebCore::unifiedTextCheckerEnabled(m_frame);
 }
 
 void Editor::toggleOverwriteModeEnabled()
 {
     m_overwriteModeEnabled = !m_overwriteModeEnabled;
     frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
 };
 
 } // namespace WebCore