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

Source/core/xml/XPathEvaluator.h

Index: Source/core/xml/XPathEvaluator.h
diff --git a/Source/core/xml/XPathEvaluator.h b/Source/core/xml/XPathEvaluator.h
index c00f10057957c2a708ac6c3e020b6078685fcff0..46ed8c23c984a63c80be9103d264304bbd1fbf89 100644
--- a/Source/core/xml/XPathEvaluator.h
+++ b/Source/core/xml/XPathEvaluator.h
@@ -29,9 +29,6 @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
-#include "wtf/Forward.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
 
 namespace blink {
 
@@ -42,18 +39,18 @@ class XPathExpression;
 class XPathNSResolver;
 class XPathResult;
 
-class XPathEvaluator final : public RefCountedWillBeGarbageCollected<XPathEvaluator>, public ScriptWrappable {
+class XPathEvaluator final : public GarbageCollected<XPathEvaluator>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<XPathEvaluator> create()
+    static XPathEvaluator* create()
     {
-        return adoptRefWillBeNoop(new XPathEvaluator);
+        return new XPathEvaluator;
     }
 
-    PassRefPtrWillBeRawPtr<XPathExpression> createExpression(const String& expression, PassRefPtrWillBeRawPtr<XPathNSResolver>, ExceptionState&);
-    PassRefPtrWillBeRawPtr<XPathNSResolver> createNSResolver(Node* nodeResolver);
-    PassRefPtrWillBeRawPtr<XPathResult> evaluate(const String& expression, Node* contextNode,
-        PassRefPtrWillBeRawPtr<XPathNSResolver>, unsigned short type, const ScriptValue&, ExceptionState&);
+    XPathExpression* createExpression(const String& expression, XPathNSResolver*, ExceptionState&);
+    XPathNSResolver* createNSResolver(Node* nodeResolver);
+    XPathResult* evaluate(const String& expression, Node* contextNode,
+        XPathNSResolver*, unsigned short type, const ScriptValue&, ExceptionState&);
 
     DEFINE_INLINE_TRACE() { }