Add a mojo ServiceRegistry to embedded workers.

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index 3dc5852db3e5365fa87660bdb176733fd58c959e..85b79ac8fae5a9277babc0c3386a9399f79e8f2d 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -26,6 +26,7 @@
 #include "content/child/worker_task_runner.h"
 #include "content/common/devtools_messages.h"
 #include "content/common/message_port_messages.h"
+#include "content/common/mojo/service_registry_impl.h"
 #include "content/common/service_worker/embedded_worker_messages.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "content/public/common/referrer.h"
@@ -198,6 +199,8 @@ struct ServiceWorkerContextClient::WorkerContextData {
   // Pending callbacks for ClaimClients().
   ClaimClientsCallbacksMap claim_clients_callbacks;
 
+  ServiceRegistryImpl service_registry;
+
   base::ThreadChecker thread_checker;
   base::WeakPtrFactory<ServiceWorkerContextClient> weak_factory;
 };
@@ -271,6 +274,13 @@ void ServiceWorkerContextClient::OnMessageReceived(
   DCHECK(handled);
 }
 
+void ServiceWorkerContextClient::BindServiceRegistry(
+    mojo::InterfaceRequest<mojo::ServiceProvider> services,
+    mojo::ServiceProviderPtr exposed_services) {
+  context_->service_registry.Bind(services.Pass());
+  context_->service_registry.BindRemoteServiceProvider(exposed_services.Pass());

[kinuko, 2015/07/16 15:29:41]

nit: could we have a short helpful comment to note for readers that are not
familiar with mojo that ServiceRegistry queues up connection attempts until this
is called so timing to call this is not that sensitive?

+}
+
 blink::WebURL ServiceWorkerContextClient::scope() const {
   return service_worker_scope_;
 }