Mojo: Cancel WaitingCallbacks when their HandleWrappers are closed.

mojo/bindings/js/support.cc

 // 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.
 
 #include "mojo/bindings/js/support.h"
 
 #include "base/bind.h"
 #include "gin/arguments.h"
 #include "gin/converter.h"
 #include "gin/function_template.h"
 #include "gin/object_template_builder.h"
 #include "gin/per_isolate_data.h"
 #include "gin/public/wrapper_info.h"
 #include "gin/wrappable.h"
 #include "mojo/bindings/js/handle.h"
 #include "mojo/bindings/js/waiting_callback.h"
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
 namespace js {
 
 namespace {
 
-WaitingCallback* AsyncWait(const gin::Arguments& args, mojo::Handle handle,
+WaitingCallback* AsyncWait(const gin::Arguments& args,
+                           gin::Handle<gin::HandleWrapper> handle,
                            MojoHandleSignals signals,
                            v8::Handle<v8::Function> callback) {
   return WaitingCallback::Create(args.isolate(), callback, handle, signals)
              .get();
 }
 
 void CancelWait(WaitingCallback* waiting_callback) {
   waiting_callback->Cancel();
 }
 
@@ skipping 15 matching lines @@
                 .Build();
 
     data->SetObjectTemplate(&g_wrapper_info, templ);
   }
 
   return templ->NewInstance();
 }
 
 }  // namespace js
 }  // namespace mojo