Invalidate the previous caret location when editing text nodes.

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 3911 matching lines @@
     for (Range* range : m_ranges)
         range->nodeWillBeRemoved(n);
 
     if (LocalFrame* frame = this->frame()) {
         frame->eventHandler().nodeWillBeRemoved(n);
         frame->selection().nodeWillBeRemoved(n);
         frame->page()->dragCaretController().nodeWillBeRemoved(n);
     }
 }
 
+void Document::dataWillChange(const CharacterData& characterData)
+{
+    if (LocalFrame* frame = this->frame())
+        frame->selection().dataWillChange(characterData);
+}
+
 void Document::didInsertText(Node* text, unsigned offset, unsigned length)
 {
     for (Range* range : m_ranges)
         range->didInsertText(text, offset, length);
 
     m_markers->shiftMarkers(text, offset, length);
 }
 
 void Document::didRemoveText(Node* text, unsigned offset, unsigned length)
 {
@@ skipping 2093 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().getString().utf8().data());
 }
 #endif