Hook up Android closed captions 'enabled' setting to Blink

Source/core/frame/Settings.h

Index: Source/core/frame/Settings.h
diff --git a/Source/core/frame/Settings.h b/Source/core/frame/Settings.h
index 72c842f2a772d67ea46d9f39f51f7a84c799aa04..34b6df9ed3a4033bf247876d59bb94b9e73981fa 100644
--- a/Source/core/frame/Settings.h
+++ b/Source/core/frame/Settings.h
@@ -69,6 +69,9 @@ public:
     void setOpenGLMultisamplingEnabled(bool flag);
     bool openGLMultisamplingEnabled() { return m_openGLMultisamplingEnabled; }
 
+    void setTextTracksEnabled(bool);

[tkent, 2015/04/29 23:58:44]

No need to add manually-written functions.
Add the following line to Settings.in:
    textTrackEnabled initial=false invalidate=TextTracksVisibilityChange

[srivats, 2015/05/01 23:03:31]

Done.

+    bool textTracksEnabled() const { return m_textTracksEnabled; }
+
     void setDelegate(SettingsDelegate*);
 
 private:
@@ -82,6 +85,7 @@ private:
     bool m_openGLMultisamplingEnabled : 1;
     IntSize m_textAutosizingWindowSizeOverride;
     bool m_textAutosizingEnabled : 1;
+    bool m_textTracksEnabled : 1;
 
     SETTINGS_MEMBER_VARIABLES
 };