Introduce Position::inDocument()

Source/core/editing/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 Google Inc. All rights reserved.
  *
  * 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 1146 matching lines @@
         // before the selection that was pasted into would also move content after
         // the selection that was pasted into if: only one paragraph was being pasted,
         // and it was not wrapped in a block, the selection that was pasted into ended
         // at the end of a block and the next paragraph didn't start at the start of a block.
         // Insert a line break just after the inserted content to separate it from what
         // comes after and prevent that from happening.
         VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
         if (startOfParagraph(endOfInsertedContent) == startOfParagraphToMove) {
             insertNodeAt(createBreakElement(document()).get(), endOfInsertedContent.deepEquivalent());
             // Mutation events (bug 22634) triggered by inserting the <br> might have removed the content we're about to move
-            if (!startOfParagraphToMove.deepEquivalent().anchorNode()->inDocument())
+            if (!startOfParagraphToMove.deepEquivalent().inDocument())
                 return;
         }
 
         // FIXME: Maintain positions for the start and end of inserted content instead of keeping nodes.  The nodes are
         // only ever used to create positions where inserted content starts/ends.
         moveParagraph(startOfParagraphToMove, endOfParagraph(startOfParagraphToMove), destination);
         m_startOfInsertedContent = endingSelection().visibleStart().deepEquivalent().downstream();
         if (m_endOfInsertedContent.isOrphan())
             m_endOfInsertedContent = endingSelection().visibleEnd().deepEquivalent().upstream();
     }
@@ skipping 309 matching lines @@
         removeNodeAndPruneAncestors(nodeAfterInsertionPos.get());
 
     VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
 
     setEndingSelection(selectionAfterReplace);
 
     return true;
 }
 
 } // namespace WebCore