Hook up Android closed captions 'enabled' setting to Blink

Source/core/html/track/TextTrackKindUserPreference.h

Index: Source/core/html/track/TextTrackKindUserPreference.h
diff --git a/Source/core/html/track/TextTrackKindUserPreference.h b/Source/core/html/track/TextTrackKindUserPreference.h
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+++ b/Source/core/html/track/TextTrackKindUserPreference.h
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+// 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 TextTrackKindUserPreference_h
+#define TextTrackKindUserPreference_h
+
+namespace blink {
+
+// Defines user preference for text track kind.
+enum class TextTrackKindUserPreference {
+    // Display only tracks marked as default
+    Default,
+    // Display caption tracks if available and if not display subtitles in preferred language
+    Captions,
+    // Display subtitle tracks if available
+    Subtitles
+};
+
+} // namespace blink
+
+#endif // TextTrackKindUserPreference_h