CSP: Move policy parsing out of Document.

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 d590c582e6da5518f06242eef9ded11f61d6b3e8..d97c01fedf5c2925ba512fe9252a2223f755d040 100644
--- a/Source/core/xml/XSLTProcessor.cpp
+++ b/Source/core/xml/XSLTProcessor.cpp
@@ -86,7 +86,7 @@ PassRefPtrWillBeRawPtr<Document> XSLTProcessor::createDocumentFromSource(const S
             result->setTransformSourceDocument(oldDocument.get());
             result->updateSecurityOrigin(oldDocument->securityOrigin());
             result->setCookieURL(oldDocument->cookieURL());
-            result->contentSecurityPolicy()->copyStateFrom(oldDocument->contentSecurityPolicy());
+            result->initContentSecurityPolicy();
         }
     } else {
         result = LocalDOMWindow::createDocument(sourceMIMEType, init, forceXHTML);