sendBeacon should throw a TypeError on bad URLs.

third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html

Index: third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html b/third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html
index 4ad82c957d9ab0d5daa6db9ed813dd0bf86cd461..b8e4afc892a8431b807882abd6c1548cccef618b 100644
--- a/third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html
+++ b/third_party/WebKit/LayoutTests/fast/events/message-channel-gc-4.html
@@ -2,16 +2,8 @@
 <p>Test that MessagePort messages are delivered even if both ports are in transit (cloned).</p>
 <p>Should say PASS twice.</p>
 <pre id=log></pre>
+<script src="../../resources/gc.js"></script>
 <script>
-function gc()
-{
-    if (window.GCController)
-        return GCController.collect();
-
-    for (var i = 0; i < 10000; i++) { // force garbage collection (FF requires about 9K allocations before a collect)
-        var s = new String("abc");
-    }
-}
 
 function log(message)
 {