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..b539b67d19a5adb0f87cb4c24fc0e559601f4e17
--- /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,
+    // Display caption tracks if available and if not display subtitles in preferred language.

[philipj_slow, 2015/07/09 15:34:09]

So now I've read the code again, and I can't see a difference between captions
and subtitles as far as fallback is concerned, in both cases the other kind may
be used under the same conditions, right? Not a problem, just documentation that
needs to be updated.

[srivats, 2015/07/09 21:25:37]

Done.

+    Captions,
+    // Display subtitle tracks if available.
+    Subtitles
+};
+
+} // namespace blink
+
+#endif // TextTrackKindUserPreference_h