[Cast, Android] Reimplement ReceiverAction.CAST message for the new cast_sender.js

chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java b/chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java
index a84e1e0ae0d5b634ab7d074d2d3fc3a6710c9c9f..711b5a98e2086a203c2ad8a210a8953f4687953f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/ClientRecord.java
@@ -6,6 +6,9 @@ package org.chromium.chrome.browser.media.router.cast;
 
 import org.chromium.chrome.browser.media.router.MediaRoute;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Contains information about a single client connection to the {@link MediaRoute}.
  */
@@ -40,6 +43,16 @@ public class ClientRecord {
      */
     public final int tabId;
 
+    /**
+     * Whether the client is ready to receive messages.
+     */
+    public boolean isConnected = false;
+
+    /**
+     * The pending messages for the client.
+     */
+    public List<String> pendingMessages = new ArrayList<String>();
+
     ClientRecord(
             String routeId,
             String clientId,