Move ownership of the TextResourceDecoder to DecodedDataDocumentParser

Source/core/dom/DocumentParser.h

Index: Source/core/dom/DocumentParser.h
diff --git a/Source/core/dom/DocumentParser.h b/Source/core/dom/DocumentParser.h
index 3b3969b21c1e6780be2d31a79198cd45a49c6f3c..b38d380ecbf6db0e9d347e2ed1071e782434d64f 100644
--- a/Source/core/dom/DocumentParser.h
+++ b/Source/core/dom/DocumentParser.h
@@ -26,6 +26,7 @@
 
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
+#include "wtf/RefPtr.h"
 
 namespace WebCore {
 
@@ -33,6 +34,7 @@ class Document;
 class DocumentWriter;
 class SegmentedString;
 class ScriptableDocumentParser;
+class TextResourceDecoder;
 
 class DocumentParser : public RefCounted<DocumentParser> {
 public:
@@ -50,6 +52,7 @@ public:
     virtual size_t appendBytes(const char* bytes, size_t length) = 0;
     virtual size_t flush() = 0;
     virtual bool needsDecoder() const { return false; }
+    virtual void setDecoder(PassRefPtr<TextResourceDecoder>) { ASSERT_NOT_REACHED(); }
 
     // pinToMainThread also makes append() not yield before completion of that chunk.
     virtual void pinToMainThread() { }