WIP attempt to replace StartWorker/StopWorker IPCs with a new mojo EmbeddedWorker service.

content/browser/service_worker/embedded_worker_registry.cc

Index: content/browser/service_worker/embedded_worker_registry.cc
diff --git a/content/browser/service_worker/embedded_worker_registry.cc b/content/browser/service_worker/embedded_worker_registry.cc
index f204a206c6e7ee5c7b675bfbccfedd1dfe206635..88076415fc76b4e9ef60725512034b5adf3529ba 100644
--- a/content/browser/service_worker/embedded_worker_registry.cc
+++ b/content/browser/service_worker/embedded_worker_registry.cc
@@ -42,12 +42,6 @@ scoped_ptr<EmbeddedWorkerInstance> EmbeddedWorkerRegistry::CreateWorker() {
   return worker.Pass();
 }
 
-ServiceWorkerStatusCode EmbeddedWorkerRegistry::StopWorker(
-    int process_id, int embedded_worker_id) {
-  return Send(process_id,
-              new EmbeddedWorkerMsg_StopWorker(embedded_worker_id));
-}
-
 bool EmbeddedWorkerRegistry::OnMessageReceived(const IPC::Message& message,
                                                int process_id) {
   // TODO(kinuko): Move all EmbeddedWorker message handling from
@@ -233,18 +227,13 @@ EmbeddedWorkerRegistry::~EmbeddedWorkerRegistry() {
   Shutdown();
 }
 
-ServiceWorkerStatusCode EmbeddedWorkerRegistry::SendStartWorker(
-    scoped_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
-    int process_id) {
-  if (!context_)
-    return SERVICE_WORKER_ERROR_ABORT;
-
+void EmbeddedWorkerRegistry::WorkerStarting(int embedded_worker_id,
+                                            int process_id) {
   // The ServiceWorkerDispatcherHost is supposed to be created when the process
   // is created, and keep an entry in process_sender_map_ for its whole
   // lifetime.
   DCHECK(ContainsKey(process_sender_map_, process_id));
 
-  int embedded_worker_id = params->embedded_worker_id;
   WorkerInstanceMap::iterator found = worker_map_.find(embedded_worker_id);
   DCHECK(found != worker_map_.end());
   DCHECK_EQ(found->second->process_id(), process_id);
@@ -252,11 +241,7 @@ ServiceWorkerStatusCode EmbeddedWorkerRegistry::SendStartWorker(
   DCHECK(!ContainsKey(worker_process_map_, process_id) ||
          worker_process_map_[process_id].count(embedded_worker_id) == 0);
 
-  ServiceWorkerStatusCode status =
-      Send(process_id, new EmbeddedWorkerMsg_StartWorker(*params));
-  if (status == SERVICE_WORKER_OK)
-    worker_process_map_[process_id].insert(embedded_worker_id);
-  return status;
+  worker_process_map_[process_id].insert(embedded_worker_id);
 }
 
 ServiceWorkerStatusCode EmbeddedWorkerRegistry::Send(