Oilpan: have xml/ objects on the heap by default.

Source/core/xml/DocumentXSLT.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/xml/DocumentXSLT.h"
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8AbstractEventListener.h"
@@ skipping 84 matching lines @@
 
 DocumentXSLT::DocumentXSLT()
     : m_transformSourceDocument(nullptr)
 {
 }
 
 void DocumentXSLT::applyXSLTransform(Document& document, ProcessingInstruction* pi)
 {
     ASSERT(!pi->isLoading());
     UseCounter::count(document, UseCounter::XSLProcessingInstruction);
-    RefPtrWillBeRawPtr<XSLTProcessor> processor = XSLTProcessor::create(document);
+    XSLTProcessor* processor = XSLTProcessor::create(document);
     processor->setXSLStyleSheet(toXSLStyleSheet(pi->sheet()));
     String resultMIMEType;
     String newSource;
     String resultEncoding;
     document.setParsingState(Document::Parsing);
     if (!processor->transformToString(&document, resultMIMEType, newSource, resultEncoding)) {
         document.setParsingState(Document::FinishedParsing);
         return;
     }
     // FIXME: If the transform failed we should probably report an error (like Mozilla does).
@@ skipping 80 matching lines @@
     return *supplement;
 }
 
 DEFINE_TRACE(DocumentXSLT)
 {
     visitor->trace(m_transformSourceDocument);
     WillBeHeapSupplement<Document>::trace(visitor);
 }
 
 } // namespace blink