[Media Router WebUI] Add slight delay before requesting initial data for Mac.

chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js

Index: chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js
diff --git a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js
index c3af59def0a63d4c78f4df1776562746284d1618..81c73fb172d8c22322240e40a8e6bd350c84a111 100644
--- a/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js
+++ b/chrome/browser/resources/media_router/elements/media_router_container/media_router_container.js
@@ -426,6 +426,14 @@ Polymer({
           sinkCount: this.allSinks.length,
         });
       }, 3000 /* 3 seconds */);
+
+      // For Mac platforms, request data after a short delay after load. This
+      // appears to speed up initial data load time on Mac.
+      if (cr.isMac) {
+        this.async(function() {
+          this.fire('request-initial-data');
+        }, 25 /* 0.025 seconds */);
+      }
     });
   },