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
new file mode 100644
index 0000000000000000000000000000000000000000..ff927c7a7df6e0003c7ef8de4014de48277bcd1f
--- /dev/null
+++ b/Source/core/html/track/TextTrackKindUserPreference.h
@@ -0,0 +1,22 @@
+// 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,
+    // If available, display captions track in preferred language, else display subtitles.
+    Captions,
+    // If available, display subtitles track in preferred language, else display captions.
+    Subtitles
+};
+
+} // namespace blink
+
+#endif // TextTrackKindUserPreference_h