Revert of service worker: use 200 OK for update requests even in the no update case

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 6811d2c45833def7269dea33bf2c36ac26945f8f..4afc83be0c0b62684b41939fa502c00310ddbd93 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -328,11 +328,6 @@
   DISALLOW_COPY_AND_ASSIGN(StartTask);
 };
 
-bool EmbeddedWorkerInstance::Listener::OnMessageReceived(
-    const IPC::Message& message) {
-  return false;
-}
-
 EmbeddedWorkerInstance::~EmbeddedWorkerInstance() {
   DCHECK(status_ == STOPPING || status_ == STOPPED) << status_;
   devtools_proxy_.reset();
@@ -344,8 +339,7 @@
 void EmbeddedWorkerInstance::Start(int64_t service_worker_version_id,
                                    const GURL& scope,
                                    const GURL& script_url,
-                                   const StatusCallback& callback,
-                                   bool pause_after_download) {
+                                   const StatusCallback& callback) {
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
     // |this| may be destroyed by the callback.
@@ -371,7 +365,6 @@
   params->script_url = script_url;
   params->worker_devtools_agent_route_id = MSG_ROUTING_NONE;
   params->wait_for_debugger = false;
-  params->pause_after_download = pause_after_download;
   params->v8_cache_options = GetV8CacheOptions();
 
   inflight_start_task_.reset(new StartTask(this));
@@ -417,13 +410,6 @@
   return registry_->Send(process_id(),
                          new EmbeddedWorkerContextMsg_MessageToWorker(
                              thread_id_, embedded_worker_id_, message));
-}
-
-void EmbeddedWorkerInstance::ResumeAfterDownload() {
-  if (process_id() == ChildProcessHost::kInvalidUniqueID || status_ != STARTING)
-    return;
-  registry_->Send(process_id(), new EmbeddedWorkerMsg_ResumeAfterDownload(
-                                    embedded_worker_id_));
 }
 
 ServiceRegistry* EmbeddedWorkerInstance::GetServiceRegistry() {