Make Resource::resourceBuffer() to return PassRefPtr<const SharedBuffer>

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006, 2008, 2014 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 630 matching lines @@
 {
     DCHECK(XMLDocumentParserScope::currentDocument);
     DCHECK_EQ(currentThread(), libxmlLoaderThread);
 
     KURL url(KURL(), uri);
 
     if (!shouldAllowExternalLoad(url))
         return &globalDescriptor;
 
     KURL finalURL;
-    RefPtr<SharedBuffer> data;
+    RefPtr<const SharedBuffer> data;
 
     {
         Document* document = XMLDocumentParserScope::currentDocument;
         XMLDocumentParserScope scope(0);
         // FIXME: We should restore the original global error handler as well.
         FetchRequest request(ResourceRequest(url), FetchInitiatorTypeNames::xml, ResourceFetcher::defaultResourceOptions());
         Resource* resource = RawResource::fetchSynchronously(request, document->fetcher());
         if (resource && !resource->errorOccurred()) {
             data = resource->resourceBuffer();
             finalURL = resource->response().url();
@@ skipping 989 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 blink