Add associated binding set. Add associated_binding.html layout test.

mojo/public/js/associated_bindings.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/associated_bindings", [
+  "mojo/public/js/bindings",
   "mojo/public/js/core",
   "mojo/public/js/interface_types",
   "mojo/public/js/lib/interface_endpoint_client",
   "mojo/public/js/lib/interface_endpoint_handle",
-], function(core, types, interfaceEndpointClient, interfaceEndpointHandle) {
+], function(bindings,
+            core,
+            types,
+            interfaceEndpointClient,
+            interfaceEndpointHandle) {
 
   var InterfaceEndpointClient = interfaceEndpointClient.InterfaceEndpointClient;
 
   // ---------------------------------------------------------------------------
 
   function makeRequest(associatedInterfacePtrInfo) {
     var {handle0, handle1} =
         interfaceEndpointHandle.createPairPendingAssociation();
 
     associatedInterfacePtrInfo.interfaceEndpointHandle = handle0;
@@ skipping 209 matching lines @@
     if (!this.isBound()) {
       return new types.AssociatedInterfaceRequest(null);
     }
 
     var result = new types.AssociatedInterfaceRequest(
         this.interfaceEndpointClient_.passHandle());
     this.close();
     return result;
   };
 
+  // ---------------------------------------------------------------------------
+
+  function AssociatedBindingSet(interfaceType) {
+    bindings.BindingSet.call(this, interfaceType);
+    this.bindingType_ = AssociatedBinding;
+  }
+
+  AssociatedBindingSet.prototype = Object.create(bindings.BindingSet.prototype);
+  AssociatedBindingSet.prototype.constructor = AssociatedBindingSet;
+
   var exports = {};
   exports.AssociatedInterfacePtrInfo = types.AssociatedInterfacePtrInfo;
   exports.AssociatedInterfaceRequest = types.AssociatedInterfaceRequest;
   exports.makeRequest = makeRequest;
   exports.AssociatedInterfacePtrController = AssociatedInterfacePtrController;
   exports.AssociatedBinding = AssociatedBinding;
+  exports.AssociatedBindingSet = AssociatedBindingSet;
 
   return exports;
 });