Change RenderFrame to use InterfaceRegistry et al.

services/shell/public/cpp/lib/callback_binder.cc

Index: services/shell/public/cpp/lib/callback_binder.cc
diff --git a/services/shell/public/cpp/lib/callback_binder.cc b/services/shell/public/cpp/lib/callback_binder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..19196ebd196bf03e8a5f34e044307c4f5057c283
--- /dev/null
+++ b/services/shell/public/cpp/lib/callback_binder.cc
@@ -0,0 +1,39 @@
+// Copyright 2016 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 "services/shell/public/cpp/lib/callback_binder.h"
+
+namespace shell {
+namespace internal {
+
+GenericCallbackBinder::GenericCallbackBinder(
+    const BindCallback& callback,
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : callback_(callback), task_runner_(task_runner) {}
+
+GenericCallbackBinder::~GenericCallbackBinder() {}
+
+void GenericCallbackBinder::BindInterface(
+    Connection* connection,
+    const std::string& interface_name,
+    mojo::ScopedMessagePipeHandle handle) {
+  if (task_runner_) {
+    task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&GenericCallbackBinder::RunCallbackOnTaskRunner, callback_,
+                    base::Passed(&handle)));
+    return;
+  }
+  callback_.Run(std::move(handle));
+}
+
+// static
+void GenericCallbackBinder::RunCallbackOnTaskRunner(
+    const BindCallback& callback,
+    mojo::ScopedMessagePipeHandle client_handle) {
+  callback.Run(std::move(client_handle));
+}
+
+}  // namespace internal
+}  // namespace shell