Convert UtilityThread/Clients to add ConnectionFilters instead of using ChildThread's InterfaceRegi…

content/public/common/simple_connection_filter.cc

Index: content/public/common/simple_connection_filter.cc
diff --git a/content/public/common/simple_connection_filter.cc b/content/public/common/simple_connection_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9b321750dc05d14ff4071952249a68bc5628efb2
--- /dev/null
+++ b/content/public/common/simple_connection_filter.cc
@@ -0,0 +1,29 @@
+// 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.
+
+#include "content/public/common/simple_connection_filter.h"
+
+#include "services/service_manager/public/cpp/binder_registry.h"
+#include "services/service_manager/public/cpp/service_info.h"
+
+namespace content {
+
+SimpleConnectionFilter::SimpleConnectionFilter(
+    std::unique_ptr<service_manager::BinderRegistry> registry)
+    : registry_(std::move(registry)) {}
+
+SimpleConnectionFilter::~SimpleConnectionFilter() {}
+
+void SimpleConnectionFilter::OnBindInterface(
+    const service_manager::ServiceInfo& source_info,
+    const std::string& interface_name,
+    mojo::ScopedMessagePipeHandle* interface_pipe,
+    service_manager::Connector* connector) {
+  if (registry_->CanBindInterface(interface_name)) {
+    registry_->BindInterface(source_info.identity, interface_name,
+                             std::move(*interface_pipe));
+  }
+}
+
+}  // namespace content