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

content/renderer/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/service_registry_js_wrapper.h"
+
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/service_registry_js.h"
+#include "mojo/bindings/js/handle.h"
+
+namespace content {
+
+gin::WrapperInfo ServiceRegistryJsWrapper::kWrapperInfo = {
+    gin::kEmbedderNativeGin};
+const char kServiceRegistryModuleName[] =
+    "content/public/renderer/service_registry";
+
+v8::Handle<v8::Value> WrapServiceRegistry(v8::Isolate* isolate,
+                                          ServiceRegistry* service_registry) {
+  return ServiceRegistryJsWrapper::Create(isolate,
+                                          service_registry->AsWeakPtr()).ToV8();
+}
+
+ServiceRegistryJsWrapper::~ServiceRegistryJsWrapper() {
+}
+
+// static
+gin::Handle<ServiceRegistryJsWrapper> ServiceRegistryJsWrapper::Create(
+    v8::Isolate* isolate,
+    base::WeakPtr<ServiceRegistry> service_registry) {
+  return gin::CreateHandle(isolate,
+                           new ServiceRegistryJsWrapper(service_registry));
+}
+
+gin::ObjectTemplateBuilder ServiceRegistryJsWrapper::GetObjectTemplateBuilder(
+    v8::Isolate* isolate) {
+  return Wrappable<ServiceRegistryJsWrapper>::GetObjectTemplateBuilder(isolate)
+      .SetMethod("getInterface", &ServiceRegistryJsWrapper::GetInterface);

[darin (slow to review), 2014/06/21 04:44:16]

nit: "." operator on the previous line

[Sam McNally, 2014/06/24 08:45:01]

Done.

+}
+
+mojo::Handle ServiceRegistryJsWrapper::GetInterface(
+    const std::string& service_name) {
+  mojo::MessagePipe pipe;
+  if (service_registry_)
+    service_registry_->GetInterface(service_name, pipe.handle0.Pass());
+  return pipe.handle1.release();
+}
+
+ServiceRegistryJsWrapper::ServiceRegistryJsWrapper(
+    base::WeakPtr<ServiceRegistry> service_registry)
+    : service_registry_(service_registry) {
+}
+
+}  // namespace content