Expose text track settings in Content and implement for Android

content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/EmptyCaptioningBridge.java

Index: content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/EmptyCaptioningBridge.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/EmptyCaptioningBridge.java b/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/EmptyCaptioningBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..da2568370b36b37405ac9795ce0aafebfb8ec3b5
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/accessibility/captioning/EmptyCaptioningBridge.java
@@ -0,0 +1,21 @@
+// 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.
+
+package org.chromium.content.browser.accessibility.captioning;
+
+/**
+ * This is the empty implementation of SystemCaptioningBridge that does nothing used
+ * on versions of Android that do not have support for system closed captioning settings.
+ */
+public class EmptyCaptioningBridge implements SystemCaptioningBridge {
+    /**
+     * A no-op implementation of the syncToDelegate function.
+     */
+    public void syncToDelegate() {}
+
+    /**
+     * A no-op implementation of the destroy function.
+     */
+    public void destroy() {}
+}