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

chrome/browser/resources/media_router/media_router_ui_interface.js

 // 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.
 
 // API invoked by the browser MediaRouterWebUIMessageHandler to communicate
 // with this UI.
 cr.define('media_router.ui', function() {
   'use strict';
 
   // The media-router-container element.
@@ skipping 332 matching lines @@
    *
    * @param {string} sinkId The sink ID.
    * @param {number} selectedCastMode The value of the cast mode the user
    *   selected.
    */
   function requestRoute(sinkId, selectedCastMode) {
     chrome.send('requestRoute',
                 [{sinkId: sinkId, selectedCastMode: selectedCastMode}]);
   }
 
+  /**
+   * Requests that the media router search all providers for a sink with id
+   * |sinkId| that can be used with the media source associated with the cast
+   * mode |selectedCastMode|.
+   *
+   * @param {string} sinkId Sink ID to search for.
+   * @param {number} selectedCastMode The value of the cast mode to be used with
+   *   the sink.
+   */
+  function searchProviders(sinkId, selectedCastMode) {
+    chrome.send('searchProviders',
+                [{sinkId: sinkId, selectedCastMode: selectedCastMode}]);
+  }
+
   return {
     acknowledgeFirstRunFlow: acknowledgeFirstRunFlow,
     actOnIssue: actOnIssue,
     closeDialog: closeDialog,
     closeRoute: closeRoute,
     joinRoute: joinRoute,
     onInitialDataReceived: onInitialDataReceived,
     reportBlur: reportBlur,
     reportClickedSinkIndex: reportClickedSinkIndex,
     reportInitialAction: reportInitialAction,
     reportInitialState: reportInitialState,
     reportNavigateToView: reportNavigateToView,
     reportRouteCreation: reportRouteCreation,
     reportRouteCreationOutcome: reportRouteCreationOutcome,
     reportSelectedCastMode: reportSelectedCastMode,
     reportSinkCount: reportSinkCount,
     reportTimeToClickSink: reportTimeToClickSink,
     reportTimeToInitialActionClose: reportTimeToInitialActionClose,
     requestInitialData: requestInitialData,
     requestRoute: requestRoute,
+    searchProviders: searchProviders,
   };
 });