Let TextTrackResource be a RawResource

Source/core/fetch/TextTrackResource.h

Index: Source/core/fetch/TextTrackResource.h
diff --git a/Source/core/fetch/TextTrackResource.h b/Source/core/fetch/TextTrackResource.h
index 3599f0bfa4dbada20fdb868eb77aa8a74be47c09..48af088ed8d7bbb214734e67bcca6ce40402b600 100644
--- a/Source/core/fetch/TextTrackResource.h
+++ b/Source/core/fetch/TextTrackResource.h
@@ -26,16 +26,14 @@
 #ifndef TextTrackResource_h
 #define TextTrackResource_h
 
-#include "core/fetch/Resource.h"
+#include "core/fetch/RawResource.h"
 
 namespace WebCore {
 
-class TextTrackResource : public Resource {
+class TextTrackResource : public RawResource {
 public:
     TextTrackResource(const ResourceRequest&);
     virtual ~TextTrackResource();
-
-    virtual void appendData(const char*, int) OVERRIDE;
 };
 
 }