Remove the unused Document& argument to the TextTrack constructor

Source/core/html/track/InbandTextTrack.h

Index: Source/core/html/track/InbandTextTrack.h
diff --git a/Source/core/html/track/InbandTextTrack.h b/Source/core/html/track/InbandTextTrack.h
index 47d39f3955597fac53d0fc064b0ea8937fa2aa5e..b5771c4ffac3b30b61c03ce953fe115c2e5f68b1 100644
--- a/Source/core/html/track/InbandTextTrack.h
+++ b/Source/core/html/track/InbandTextTrack.h
@@ -38,20 +38,19 @@ class WebString;
 
 namespace WebCore {
 
-class Document;
 class MediaPlayer;
 class TextTrackCue;
 
 class InbandTextTrack FINAL : public TextTrack, public blink::WebInbandTextTrackClient {
 public:
-    static PassRefPtrWillBeRawPtr<InbandTextTrack> create(Document&, blink::WebInbandTextTrack*);
+    static PassRefPtrWillBeRawPtr<InbandTextTrack> create(blink::WebInbandTextTrack*);
     virtual ~InbandTextTrack();
 
     size_t inbandTrackIndex();
     virtual void setTrackList(TextTrackList*) OVERRIDE FINAL;
 
 private:
-    InbandTextTrack(Document&, blink::WebInbandTextTrack*);
+    InbandTextTrack(blink::WebInbandTextTrack*);
 
     virtual void addWebVTTCue(double, double, const blink::WebString&, const blink::WebString&, const blink::WebString&) OVERRIDE;