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

chrome/browser/resources/media_router/media_router_ui_interface.js

Index: chrome/browser/resources/media_router/media_router_ui_interface.js
diff --git a/chrome/browser/resources/media_router/media_router_ui_interface.js b/chrome/browser/resources/media_router/media_router_ui_interface.js
index 23fac9c623cd78e6aab5da337abdce8a78f25093..5fb6c33ca45da7f09c74de7f28a4db545ec2ffb1 100644
--- a/chrome/browser/resources/media_router/media_router_ui_interface.js
+++ b/chrome/browser/resources/media_router/media_router_ui_interface.js
@@ -350,6 +350,20 @@ cr.define('media_router.browserApi', function() {
                 [{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,
@@ -370,5 +384,6 @@ cr.define('media_router.browserApi', function() {
     reportTimeToInitialActionClose: reportTimeToInitialActionClose,
     requestInitialData: requestInitialData,
     requestRoute: requestRoute,
+    searchProviders: searchProviders,
   };
 });