Reland of ServiceWorker: Implement StartWorker by using mojo

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 1b75f9407f63cec6135191da510dd9a6c5908fab..3859b5aa1de6a0028ed0da8bbd66bef0321dd271 100644
--- a/content/browser/service_worker/embedded_worker_registry.cc
+++ b/content/browser/service_worker/embedded_worker_registry.cc
@@ -249,7 +249,7 @@
 }
 
 ServiceWorkerStatusCode EmbeddedWorkerRegistry::SendStartWorker(
-    std::unique_ptr<EmbeddedWorkerMsg_StartWorker_Params> params,
+    std::unique_ptr<EmbeddedWorkerStartParams> params,
     int process_id) {
   if (!context_)
     return SERVICE_WORKER_ERROR_ABORT;
@@ -269,8 +269,23 @@
   ServiceWorkerStatusCode status =
       Send(process_id, new EmbeddedWorkerMsg_StartWorker(*params));
   if (status == SERVICE_WORKER_OK)
-    worker_process_map_[process_id].insert(embedded_worker_id);
+    BindWorkerToProcess(process_id, embedded_worker_id);
   return status;
+}
+
+void EmbeddedWorkerRegistry::BindWorkerToProcess(int process_id,
+                                                 int embedded_worker_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(base::ContainsKey(process_sender_map_, process_id));
+  DCHECK(GetWorker(embedded_worker_id));
+  DCHECK_EQ(GetWorker(embedded_worker_id)->process_id(), process_id);
+  DCHECK(
+      !base::ContainsKey(worker_process_map_, process_id) ||
+      !base::ContainsKey(worker_process_map_[process_id], embedded_worker_id));
+
+  worker_process_map_[process_id].insert(embedded_worker_id);
 }
 
 ServiceWorkerStatusCode EmbeddedWorkerRegistry::Send(