[Media Router] Wiring for searching route providers for new sinks.

extensions/renderer/resources/media_router_bindings.js

Index: extensions/renderer/resources/media_router_bindings.js
diff --git a/extensions/renderer/resources/media_router_bindings.js b/extensions/renderer/resources/media_router_bindings.js
index b6252c50e999fe49cbc08973532b30b1db95939b..cf0410c31e81932d45bdf7259a22ca4567343844 100644
--- a/extensions/renderer/resources/media_router_bindings.js
+++ b/extensions/renderer/resources/media_router_bindings.js
@@ -271,6 +271,16 @@ define('media_router_bindings', [
   };
 
   /**
+   * Called by the provider manager when all sinks matching |sinkId| have been
+   * found.
+   * @param {!string} sinkId
+   * @param {!Array<!MediaSink>} sinks
+   */
+  MediaRouter.prototype.onSearchSinksReceived = function(sinkId, sinks) {
+    this.service_.onSearchSinksReceived(sinkId, sinks.map(sinkToMojo_));
+  };
+
+  /**
    * Called by the provider manager to keep the extension from suspending
    * if it enters a state where suspension is undesirable (e.g. there is an
    * active MediaRoute.)
@@ -469,6 +479,11 @@ define('media_router_bindings', [
      * @type {function()}
      */
     this.connectRouteByRouteId = null;
+
+    /**
+     * @type {function(string, string)}
+     */
+    this.searchProviders = null;
   };
 
   /**
@@ -516,7 +531,8 @@ define('media_router_bindings', [
       'createRoute',
       'stopObservingMediaSinks',
       'startObservingMediaRoutes',
-      'connectRouteByRouteId'
+      'connectRouteByRouteId',
+      'searchProviders',
     ];
     requiredHandlers.forEach(function(nextHandler) {
       if (handlers[nextHandler] === undefined) {
@@ -733,6 +749,16 @@ define('media_router_bindings', [
     this.handlers_.stopObservingMediaRoutes(sourceUrn);
   };
 
+  /**
+   * Requests that the provider manager search its providers for a sink with id
+   * |sinkId| that is compatible with |sourceUrn|.
+   * @param {string} sourceUrn Media source to be used with the sink.
+   * @param {string} sinkId Sink ID to search for.
+   */
+  MediaRouteProvider.prototype.searchProviders = function(sourceUrn, sinkId) {
+    this.handlers_.searchProviders(sourceUrn, sinkId);
+  };
+
   mediaRouter = new MediaRouter(connector.bindHandleToProxy(
       serviceProvider.connectToService(
           mediaRouterMojom.MediaRouter.name),