Import wpt/webmessaging tests

third_party/WebKit/LayoutTests/external/wpt/webmessaging/without-ports/025-1.js

Index: third_party/WebKit/LayoutTests/external/wpt/webmessaging/without-ports/025-1.js
diff --git a/third_party/WebKit/LayoutTests/external/wpt/webmessaging/without-ports/025-1.js b/third_party/WebKit/LayoutTests/external/wpt/webmessaging/without-ports/025-1.js
new file mode 100644
index 0000000000000000000000000000000000000000..c088fc981947224d24859d078ef1254c1fdd7910
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/external/wpt/webmessaging/without-ports/025-1.js
@@ -0,0 +1,15 @@
+importScripts("/resources/testharness.js");
+
+test(function() {
+  var ch = new MessageChannel();
+  assert_true(ch.port1 instanceof MessagePort,
+              "Worker MessageChannel's port not an instance of MessagePort");
+}, "Worker MessageChannel's port should be an instance of MessagePort");
+
+test(function() {
+  assert_throws(new TypeError(), function() {
+    new MessagePort()
+  }, "MessagePort is [[Callable]]");
+}, "Worker MessagePort should not be [[Callable]]");
+
+done();