Demistify DocumentParser::append

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 329 matching lines @@
 #endif
         m_currentNodeStack.clear();
     }
 }
 
 void XMLDocumentParser::insert(const SegmentedString&)
 {
     ASSERT_NOT_REACHED();
 }
 
-void XMLDocumentParser::append(PassRefPtr<StringImpl> inputSource)
+void XMLDocumentParser::append(const String& inputSource)
 {
-    SegmentedString source(inputSource);
+    const SegmentedString source(inputSource);
     if (m_sawXSLTransform || !m_sawFirstElement)
         m_originalSourceForTransform.append(source);
 
     if (isStopped() || m_sawXSLTransform)
         return;
 
     if (m_parserPaused) {
         m_pendingSrc.append(source);
         return;
     }
@@ skipping 1277 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