[Presentation API, Android] Plumbing SendBinaryMessage() from C++ MediaRouterAndroid to java side.

chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java b/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
index b73dc56940190e2f01719582fa7d03822e879963..31b52dfe30ed6c86f71f95301dc229b103232ab3 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/router/ChromeMediaRouter.java
@@ -301,6 +301,20 @@ public class ChromeMediaRouter implements MediaRouteManager {
         provider.sendStringMessage(routeId, message, callbackId);
     }
 
+    /**
+     * Sends a binary message to the specified route.
+     * @param routeId The id of the route to send the message to.
+     * @param data The binary message to send.
+     * @param callbackId The id of the result callback tracked by the native side.
+     */
+    @CalledByNative
+    public void sendBinaryMessage(String routeId, byte[] data, int callbackId) {
+        MediaRouteProvider provider = mRouteIdsToProviders.get(routeId);
+        assert provider != null;
+
+        provider.sendBinaryMessage(routeId, data, callbackId);
+    }
+
     @VisibleForTesting
     ChromeMediaRouter(long nativeMediaRouter, Context applicationContext) {
         MediaRouteProvider provider = CastMediaRouteProvider.create(applicationContext, this);