[ServiceWorker] Add EmbeddedWorkerInstanceHost Interface.

content/browser/service_worker/embedded_worker_instance.cc

Index: content/browser/service_worker/embedded_worker_instance.cc
diff --git a/content/browser/service_worker/embedded_worker_instance.cc b/content/browser/service_worker/embedded_worker_instance.cc
index 727f2d548847080b097b6c2dbad2333621aace02..5d6b8eb654e303ea787697f6020426ad89aaffcc 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -556,6 +556,7 @@ EmbeddedWorkerInstance::EmbeddedWorkerInstance(
       starting_phase_(NOT_STARTING),
       restart_count_(0),
       thread_id_(kInvalidEmbeddedWorkerThreadId),
+      instance_host_binding_(this),
       devtools_attached_(false),
       network_accessed_for_script_(false),
       weak_factory_(this) {}
@@ -595,8 +596,13 @@ ServiceWorkerStatusCode EmbeddedWorkerInstance::SendStartWorker(
     std::unique_ptr<EmbeddedWorkerStartParams> params) {
   if (!context_)
     return SERVICE_WORKER_ERROR_ABORT;
+
+  mojom::EmbeddedWorkerInstanceHostAssociatedPtrInfo host_ptr_info;
+  instance_host_binding_.Bind(&host_ptr_info);
+
   DCHECK(pending_dispatcher_request_.is_pending());
-  client_->StartWorker(*params, std::move(pending_dispatcher_request_));
+  client_->StartWorker(*params, std::move(pending_dispatcher_request_),
+                       std::move(host_ptr_info));
   registry_->BindWorkerToProcess(process_id(), embedded_worker_id());
   TRACE_EVENT_ASYNC_STEP_PAST0("ServiceWorker", "EmbeddedWorkerInstance::Start",
                                this, "SendStartWorker");
@@ -619,6 +625,7 @@ void EmbeddedWorkerInstance::OnStartWorkerMessageSent() {
 }
 
 void EmbeddedWorkerInstance::OnReadyForInspection() {
+  TRACE_EVENT0("ServiceWorker", "EmbeddedWorkerInstance::OnReadyForInspection");
   if (devtools_proxy_)
     devtools_proxy_->NotifyWorkerReadyForInspection();
 }