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

chrome/browser/resources/media_router/media_router.js

Index: chrome/browser/resources/media_router/media_router.js
diff --git a/chrome/browser/resources/media_router/media_router.js b/chrome/browser/resources/media_router/media_router.js
index 8f1c6ea2bf97797df2cb92dc9fc53c08468e6f0e..ddb7a99af01172829858d773deb003f15845b08e 100644
--- a/chrome/browser/resources/media_router/media_router.js
+++ b/chrome/browser/resources/media_router/media_router.js
@@ -31,6 +31,7 @@ cr.define('media_router', function() {
 
     container.addEventListener('acknowledge-first-run-flow',
                                onAcknowledgeFirstRunFlow);
+    container.addEventListener('add-hangout', onAddHangout);
     container.addEventListener('back-click', onNavigateToSinkList);
     container.addEventListener('cast-mode-selected', onCastModeSelected);
     container.addEventListener('close-dialog', onCloseDialog);
@@ -67,6 +68,20 @@ cr.define('media_router', function() {
   }
 
   /**
+   * Requests that the Media Router searches for a sink named
+   * |event.detail.name|.
+   * @param {!Event} event
+   * Parameters in |event|.detail:
+   *   name - Name of the sink to search for.
+   *   selectedCastMode - type of cast mode selected by the user.
+   */
+  function onAddHangout(event) {
+    var detail = event.detail;
+    media_router.browserApi.searchProviders(detail.name,
+                                            detail.selectedCastMode);
+  }
+
+  /**
    * Reports the selected cast mode.
    * Called when the user selects a cast mode from the picker.
    *