Roll IDL to Dartium37 (r181268)

modules/serviceworkers/Client.idl

Index: modules/serviceworkers/Client.idl
diff --git a/modules/serviceworkers/Client.idl b/modules/serviceworkers/Client.idl
new file mode 100644
index 0000000000000000000000000000000000000000..e30fd2b0c06cdb78b694ccfd71ba0d0ca699c049
--- /dev/null
+++ b/modules/serviceworkers/Client.idl
@@ -0,0 +1,16 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#client-interface
+[
+    Exposed=ServiceWorker,
+    RuntimeEnabled=ServiceWorker
+] interface Client {
+    readonly attribute unsigned long id;
+
+    // FIXME: Currently we think targetOrigin's probably not necessary, but
+    // re-add it if the ongoing issue [1] concludes the other way.
+    // [1] https://github.com/slightlyoff/ServiceWorker/issues/190
+    [Custom, RaisesException, CallWith=ExecutionContext] void postMessage(SerializedScriptValue message, optional MessagePort[] messagePorts);
+};