Add a Javascript wrapper around ServiceRegistry and expose it to WebUI.

content/renderer/mojo/service_registry_js_wrapper.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 "content/renderer/mojo/service_registry_js_wrapper.h"
+
+#include "content/common/mojo/service_registry_impl.h"
+#include "content/public/common/service_registry.h"
+#include "mojo/bindings/js/handle.h"
+
+namespace content {
+
+gin::WrapperInfo ServiceRegistryJsWrapper::kWrapperInfo = {
+    gin::kEmbedderNativeGin};
+const char ServiceRegistryJsWrapper::kModuleName[] =
+    "content/public/renderer/service_provider";
+
+ServiceRegistryJsWrapper::~ServiceRegistryJsWrapper() {
+}
+
+// static
+gin::Handle<ServiceRegistryJsWrapper> ServiceRegistryJsWrapper::Create(
+    v8::Isolate* isolate,
+    ServiceRegistry* service_registry) {
+  return gin::CreateHandle(
+      isolate,
+      new ServiceRegistryJsWrapper(
+          static_cast<ServiceRegistryImpl*>(service_registry)->GetWeakPtr()));
+}
+
+gin::ObjectTemplateBuilder ServiceRegistryJsWrapper::GetObjectTemplateBuilder(
+    v8::Isolate* isolate) {
+  return Wrappable<ServiceRegistryJsWrapper>::GetObjectTemplateBuilder(isolate).
+      SetMethod("connectToService",
+                &ServiceRegistryJsWrapper::ConnectToService);
+}
+
+mojo::Handle ServiceRegistryJsWrapper::ConnectToService(
+    const std::string& service_name) {
+  mojo::MessagePipe pipe;
+  if (service_registry_)
+    service_registry_->ConnectToRemoteService(service_name,
+                                              pipe.handle0.Pass());
+  return pipe.handle1.release();
+}
+
+ServiceRegistryJsWrapper::ServiceRegistryJsWrapper(
+    base::WeakPtr<ServiceRegistry> service_registry)
+    : service_registry_(service_registry) {
+}
+
+}  // namespace content