Revert 146726 "AXObjectCache gets recreated during document tear..."

Source/WebCore/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 531 matching lines @@
 #if ENABLE(DELETION_UI)
     m_deleteButtonController->respondToChangedSelection(oldSelection);
 #endif
     m_alternativeTextController->respondToChangedSelection(oldSelection, options);
 }
 
 void Editor::respondToChangedContents(const VisibleSelection& endingSelection)
 {
     if (AXObjectCache::accessibilityEnabled()) {
         Node* node = endingSelection.start().deprecatedNode();
-        if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache())
-            cache->postNotification(node, AXObjectCache::AXValueChanged, false);
+        if (node)
+            m_frame->document()->axObjectCache()->postNotification(node, AXObjectCache::AXValueChanged, false);
     }
 
     updateMarkersForWordsAffectedByEditing(true);
 
     if (client())
         client()->respondToChangedContents();
 }
 
 bool Editor::hasBidiSelection() const
 {
@@ skipping 1702 matching lines @@
                 while (ContainerNode* parent = root->parentNode())
                     root = parent;
 
                 int paragraphStartIndex = TextIterator::rangeLength(Range::create(m_frame->document(), root, 0, paragraph.paragraphRange()->startContainer(), paragraph.paragraphRange()->startOffset()).get());
                 int paragraphLength = TextIterator::rangeLength(paragraph.paragraphRange().get());
                 applyCommand(SpellingCorrectionCommand::create(rangeToReplace, result->replacement));
                 // Recalculate newParagraphRange, since SpellingCorrectionCommand modifies the DOM, such that the original paragraph range is no longer valid. Radar: 10305315 Bugzilla: 89526
                 RefPtr<Range> newParagraphRange = TextIterator::rangeFromLocationAndLength(toContainerNode(root), paragraphStartIndex, paragraphLength + replacementLength - resultLength);
                 paragraph = TextCheckingParagraph(TextIterator::subrange(newParagraphRange.get(), resultLocation, replacementLength), newParagraphRange);
                 
-                if (AXObjectCache* cache = m_frame->document()->existingAXObjectCache()) {
+                if (AXObjectCache::accessibilityEnabled()) {
                     if (Element* root = m_frame->selection()->selection().rootEditableElement())
-                        cache->postNotification(root, AXObjectCache::AXAutocorrectionOccured, true);
+                        m_frame->document()->axObjectCache()->postNotification(root, AXObjectCache::AXAutocorrectionOccured, true);
                 }
 
                 selectionChanged = true;
                 offsetDueToReplacement += replacementLength - resultLength;
                 if (resultLocation < selectionOffset) {
                     selectionOffset += replacementLength - resultLength;
                     if (ambiguousBoundaryOffset >= 0)
                         ambiguousBoundaryOffset = selectionOffset - 1;
                 }
 
@@ skipping 808 matching lines @@
 {
     return m_alternativeTextController->dictationAlternativesForMarker(marker);
 }
 
 void Editor::applyDictationAlternativelternative(const String& alternativeString)
 {
     m_alternativeTextController->applyDictationAlternative(alternativeString);
 }
 
 } // namespace WebCore