Refactor TextTrackLoader to properly use the dataReceived callback

Source/core/loader/TextTrackLoader.h

Index: Source/core/loader/TextTrackLoader.h
diff --git a/Source/core/loader/TextTrackLoader.h b/Source/core/loader/TextTrackLoader.h
index 424350af61422a7ef45b508038cc55a83cfa202e..60a63e8ce8d83a019053a147ae64b397091f4c0f 100644
--- a/Source/core/loader/TextTrackLoader.h
+++ b/Source/core/loader/TextTrackLoader.h
@@ -80,7 +80,6 @@ private:
 
     TextTrackLoader(TextTrackLoaderClient*, Document&);
 
-    void processNewCueData(Resource*);
     void cueLoadTimerFired(Timer<TextTrackLoader>*);
     void corsPolicyPreventedLoad();
 
@@ -92,7 +91,6 @@ private:
     Timer<TextTrackLoader> m_cueLoadTimer;
     String m_crossOriginMode;
     State m_state;
-    unsigned m_parseOffset;
     bool m_newCuesAvailable;
 };