Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

mojo/public/js/lib/pipe_control_message_proxy.js

+// Copyright 2017 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.
+
+define("mojo/public/js/lib/pipe_control_message_proxy", [
+  "mojo/public/interfaces/bindings/pipe_control_messages.mojom",
+  "mojo/public/js/codec",
+  "mojo/public/js/interface_types",
+], function(pipeControlMessages, codec, types) {
+
+  function constructRunOrClosePipeMessage(runOrClosePipeInput) {
+    var runOrClosePipeMessageParams = new
+        pipeControlMessages.RunOrClosePipeMessageParams();
+    runOrClosePipeMessageParams.input = runOrClosePipeInput;
+
+    var messageName = pipeControlMessages.kRunOrClosePipeMessageId;
+    var payloadSize =
+        pipeControlMessages.RunOrClosePipeMessageParams.encodedSize;
+
+    var builder = new codec.MessageBuilder(messageName, payloadSize);
+    builder.encodeStruct(pipeControlMessages.RunOrClosePipeMessageParams,
+                         runOrClosePipeMessageParams);
+    var message = builder.finish();
+    message.setInterfaceId(types.kInvalidInterfaceId);
+    return message;
+  }
+
+  function PipeControlMessageProxy(receiver) {
+    this.receiver_ = receiver;
+  }
+
+  PipeControlMessageProxy.prototype.notifyPeerEndpointClosed = function(
+      interfaceId, reason) {
+    var message = this.constructPeerEndpointClosedMessage(interfaceId, reason);
+    this.receiver_.accept(message);
+  };
+
+  PipeControlMessageProxy.prototype.constructPeerEndpointClosedMessage =
+      function(interfaceId, reason) {
+    var event = new pipeControlMessages.PeerAssociatedEndpointClosedEvent();
+    event.id = interfaceId;
+    if (reason) {
+      event.disconnect_reason = new pipeControlMessages.DisconnectReason({
+          custom_reason: reason.custom_reason,
+          description: reason.description});
+    }
+    var runOrClosePipeInput = new pipeControlMessages.RunOrClosePipeInput();
+    runOrClosePipeInput.peer_associated_endpoint_closed_event = event;
+    return constructRunOrClosePipeMessage(runOrClosePipeInput);
+  };
+
+  var exports = {};
+  exports.PipeControlMessageProxy = PipeControlMessageProxy;
+
+  return exports;
+});