XMLTreeViewer should be created only in the XML viewer mode

Source/core/xml/parser/XMLDocumentParser.cpp

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Holger Hans Peter Freyther
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 79 matching lines @@
 static inline AtomicString toAtomicString(const xmlChar* string, size_t length)
 {
     return AtomicString::fromUTF8(reinterpret_cast<const char*>(string), length);
 }
 
 static inline AtomicString toAtomicString(const xmlChar* string)
 {
     return AtomicString::fromUTF8(reinterpret_cast<const char*>(string));
 }
 
+static inline bool hasNoStyleInformation(Document* document)
+{
+    if (document->sawElementsInKnownNamespaces() || document->transformSourceDocument())
+        return false;
+
+    if (!document->frame() || !document->frame()->page())
+        return false;
+
+    if (document->frame()->tree()->parent())
+        return false; // This document is not in a top frame
+
+    return true;
+}
+
 class PendingStartElementNSCallback FINAL : public XMLDocumentParser::PendingCallback {
 public:
     PendingStartElementNSCallback(const AtomicString& localName, const AtomicString& prefix, const AtomicString& uri,
         int namespaceCount, const xmlChar** namespaces, int attributeCount, int defaultedCount, const xmlChar** attributes)
         : m_localName(localName)
         , m_prefix(prefix)
         , m_uri(uri)
         , m_namespaceCount(namespaceCount)
         , m_attributeCount(attributeCount)
         , m_defaultedCount(defaultedCount)
@@ skipping 1322 matching lines @@
             // Tell libxml we're done.
             {
                 XMLDocumentParserScope scope(document()->fetcher());
                 finishParsing(context());
             }
 
             m_context = 0;
         }
     }
 
-    XMLTreeViewer xmlTreeViewer(document());
-    bool xmlViewerMode = !m_sawError && !m_sawCSS && !m_sawXSLTransform && xmlTreeViewer.hasNoStyleInformation();
+    bool xmlViewerMode = !m_sawError && !m_sawCSS && !m_sawXSLTransform && hasNoStyleInformation(document());
     if (xmlViewerMode) {
+        XMLTreeViewer xmlTreeViewer(document());
         xmlTreeViewer.transformDocumentToTreeView();
     } else if (m_sawXSLTransform) {
         xmlDocPtr doc = xmlDocPtrForString(document()->fetcher(), m_originalSourceForTransform.toString(), document()->url().string());
         document()->setTransformSource(adoptPtr(new TransformSource(doc)));
 
         document()->setParsing(false); // Make the document think it's done, so it will apply XSL stylesheets.
         document()->styleResolverChanged(RecalcStyleImmediately);
 
         // styleResolverChanged() call can detach the parser and null out its document.
         // In that case, we just bail out.
@@ skipping 146 matching lines @@
     sax.initialized = XML_SAX2_MAGIC;
     RefPtr<XMLParserContext> parser = XMLParserContext::createStringParser(&sax, &state);
     String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />";
     parseChunk(parser->context(), parseString);
     finishParsing(parser->context());
     attrsOK = state.gotAttributes;
     return state.attributes;
 }
 
 } // namespace WebCore