Move WebInbandTextTrack/WebInbandTextTrackClient to public/platform/

public/platform/WebInbandTextTrack.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 36 matching lines @@
         KindNone
     };
 
     // FIXME: Remove after Chromium's use in WebInbandTextTrackImpl has been removed.
     enum Mode {
         ModeDisabled,
         ModeHidden,
         ModeShowing
     };
 
-    virtual ~WebInbandTextTrack() {}
+    virtual ~WebInbandTextTrack() { }
 
     virtual void setClient(WebInbandTextTrackClient*) = 0;
     virtual WebInbandTextTrackClient* client() = 0;
 
     virtual Kind kind() const = 0;
     virtual WebString label() const = 0;
     virtual WebString language() const = 0;
 
     virtual int textTrackIndex() const = 0;
 };
 
 } // namespace blink
 
 #endif