Revert 78366 - Revert 78101 - Merge r76728, crbug 68263

WebCore/xml/XSLStyleSheetLibxslt.cpp

Index: WebCore/xml/XSLStyleSheetLibxslt.cpp
===================================================================
--- WebCore/xml/XSLStyleSheetLibxslt.cpp	(revision 78377)
+++ WebCore/xml/XSLStyleSheetLibxslt.cpp	(working copy)
@@ -57,7 +57,6 @@
 
 XSLStyleSheet::XSLStyleSheet(XSLImportRule* parentRule, const String& originalURL, const KURL& finalURL)
     : StyleSheet(parentRule, originalURL, finalURL)
-    , m_ownerDocument(0)
     , m_embedded(false)
     , m_processed(false) // Child sheets get marked as processed when the libxslt engine has finally seen them.
     , m_stylesheetDoc(0)
@@ -68,7 +67,6 @@
 
 XSLStyleSheet::XSLStyleSheet(Node* parentNode, const String& originalURL, const KURL& finalURL,  bool embedded)
     : StyleSheet(parentNode, originalURL, finalURL)
-    , m_ownerDocument(parentNode->document())
     , m_embedded(embedded)
     , m_processed(true) // The root sheet starts off processed.
     , m_stylesheetDoc(0)
@@ -130,9 +128,10 @@
 
 CachedResourceLoader* XSLStyleSheet::cachedResourceLoader()
 {
-    if (!m_ownerDocument)
+    Document* document = ownerDocument();
+    if (!document)
         return 0;
-    return m_ownerDocument->cachedResourceLoader();
+    return document->cachedResourceLoader();
 }
 
 bool XSLStyleSheet::parseString(const String& string, bool)
@@ -258,10 +257,18 @@
 void XSLStyleSheet::setParentStyleSheet(XSLStyleSheet* parent)
 {
     m_parentStyleSheet = parent;
-    if (parent)
-        m_ownerDocument = parent->ownerDocument();
 }
 
+Document* XSLStyleSheet::ownerDocument()
+{
+    for (XSLStyleSheet* styleSheet = this; styleSheet; styleSheet = styleSheet->parentStyleSheet()) {
+        Node* node = styleSheet->ownerNode();
+        if (node)
+            return node->document();
+    }
+    return 0;
+}
+
 xmlDocPtr XSLStyleSheet::locateStylesheetSubResource(xmlDocPtr parentDoc, const xmlChar* uri)
 {
     bool matchedParent = (parentDoc == document());