Oilpan: Enable Oilpan in modules/encoding

Source/modules/encoding/TextEncoder.h

Index: Source/modules/encoding/TextEncoder.h
diff --git a/Source/modules/encoding/TextEncoder.h b/Source/modules/encoding/TextEncoder.h
index 287ebd33bebef786ad85e3e4b313f288f0e76f10..6d1e3d3a31a7b25625a446434f45036b3c67a6e7 100644
--- a/Source/modules/encoding/TextEncoder.h
+++ b/Source/modules/encoding/TextEncoder.h
@@ -44,9 +44,9 @@ namespace WebCore {
 class Dictionary;
 class ExceptionState;
 
-class TextEncoder FINAL : public RefCountedWillBeGarbageCollectedFinalized<TextEncoder> {
+class TextEncoder FINAL : public GarbageCollectedFinalized<TextEncoder> {
 public:
-    static PassRefPtrWillBeRawPtr<TextEncoder> create(const String& utfLabel, ExceptionState&);
+    static TextEncoder* create(const String& utfLabel, ExceptionState&);
     ~TextEncoder();
 
     // Implement the IDL