Hook up Android closed captions 'enabled' setting to Blink

Source/core/html/track/AutomaticTrackSelection.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AutomaticTrackSelection_h
 #define AutomaticTrackSelection_h
 
+#include "core/html/track/TextTrackKindUserPreference.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class TextTrack;
 class TextTrackList;
 class TrackGroup;
 
 class AutomaticTrackSelection {
     STACK_ALLOCATED();
 public:
     struct Configuration {
         Configuration()
             : disableCurrentlyEnabledTracks(false)
-            , forceEnableSubtitleOrCaptionTrack(false) { }
+            , forceEnableSubtitleOrCaptionTrack(false)
+            , textTrackKindUserPreference(TextTrackKindUserPreference::Default) { }
 
         bool disableCurrentlyEnabledTracks;
         bool forceEnableSubtitleOrCaptionTrack;
+        TextTrackKindUserPreference textTrackKindUserPreference;
     };
 
     AutomaticTrackSelection(const Configuration&);
 
     void perform(TextTrackList&);
 
 private:
-    void performAutomaticTextTrackSelection(const TrackGroup&);
+    PassRefPtrWillBeRawPtr<TextTrack> performAutomaticTextTrackSelection(const TrackGroup&);
     void enableDefaultMetadataTextTracks(const TrackGroup&);
+    PassRefPtrWillBeRawPtr<TextTrack> enableTrackBasedOnUserPreference(PassRefPtrWillBeRawPtr<TextTrack>,
+        PassRefPtrWillBeRawPtr<TextTrack>);
 
     const Configuration m_configuration;
+    RefPtrWillBeRawPtr<TextTrack> m_fallbackCaptionOrSubtitleTrack;
 };
 
 } // namespace blink
 
 #endif // AutomaticTrackSelection_h