Share Custom Element registration contexts between related documents.

Source/core/xml/XSLTProcessor.cpp

Index: Source/core/xml/XSLTProcessor.cpp
diff --git a/Source/core/xml/XSLTProcessor.cpp b/Source/core/xml/XSLTProcessor.cpp
index ef407955ccba19222db7c243f54f6546e36c85ff..520faf420b4e5c2baecee566a4e1cdc73370000e 100644
--- a/Source/core/xml/XSLTProcessor.cpp
+++ b/Source/core/xml/XSLTProcessor.cpp
@@ -60,8 +60,7 @@ XSLTProcessor::~XSLTProcessor()
     ASSERT(!m_stylesheetRootNode || !m_stylesheet || m_stylesheet->hasOneRef());
 }
 
-PassRefPtr<Document> XSLTProcessor::createDocumentFromSource(const String& sourceString,
-    const String& sourceEncoding, const String& sourceMIMEType, Node* sourceNode, Frame* frame)
+PassRefPtr<Document> XSLTProcessor::createDocumentFromSource(const String& sourceString, const String& sourceEncoding, const String& sourceMIMEType, Node* sourceNode, Frame* frame, CustomElementRegistrationContextualizer::DocumentCreationReason reason)
 {
     RefPtr<Document> ownerDocument = sourceNode->document();
     bool sourceIsDocument = (sourceNode == ownerDocument.get());
@@ -74,6 +73,8 @@ PassRefPtr<Document> XSLTProcessor::createDocumentFromSource(const String& sourc
     } else
         result = DOMImplementation::createDocument(sourceMIMEType, frame, sourceIsDocument ? ownerDocument->url() : KURL(), false);
 
+    CustomElementRegistrationContextualizer::didCreateDocument(reason, result.get());
+
     // Before parsing, we need to save & detach the old document and get the new document
     // in place. We have to do this only if we're rendering the result document.
     if (frame) {
@@ -110,7 +111,7 @@ PassRefPtr<Document> XSLTProcessor::transformToDocument(Node* sourceNode)
     String resultEncoding;
     if (!transformToString(sourceNode, resultMIMEType, resultString, resultEncoding))
         return 0;
-    return createDocumentFromSource(resultString, resultEncoding, resultMIMEType, sourceNode, 0);
+    return createDocumentFromSource(resultString, resultEncoding, resultMIMEType, sourceNode, 0, CustomElementRegistrationContextualizer::XSLTProcessor_transformToDocument);
 }
 
 PassRefPtr<DocumentFragment> XSLTProcessor::transformToFragment(Node* sourceNode, Document* outputDoc)