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

content/renderer/service_worker/embedded_worker_dispatcher.cc

Index: content/renderer/service_worker/embedded_worker_dispatcher.cc
diff --git a/content/renderer/service_worker/embedded_worker_dispatcher.cc b/content/renderer/service_worker/embedded_worker_dispatcher.cc
index c99168cd0cfb0616ea0b9b1d969be6447c2fb81e..74d711d54e1a91294ef8ac88d9d28becb024f8dd 100644
--- a/content/renderer/service_worker/embedded_worker_dispatcher.cc
+++ b/content/renderer/service_worker/embedded_worker_dispatcher.cc
@@ -53,6 +53,8 @@ bool EmbeddedWorkerDispatcher::OnMessageReceived(
   IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerDispatcher, message)
     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StartWorker, OnStartWorker)
     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StopWorker, OnStopWorker)
+    IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_ResumeAfterDownload,
+                        OnResumeAfterDownload)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -97,6 +99,10 @@ void EmbeddedWorkerDispatcher::OnStartWorker(
           blink::WebEmbeddedWorkerStartData::DontWaitForDebugger;
   start_data.v8CacheOptions =
       static_cast<blink::WebSettings::V8CacheOptions>(params.v8_cache_options);
+  start_data.pauseAfterDownloadMode =
+      params.pause_after_download
+          ? blink::WebEmbeddedWorkerStartData::PauseAfterDownload
+          : blink::WebEmbeddedWorkerStartData::DontPauseAfterDownload;
 
   wrapper->worker()->startWorkerContext(start_data);
   workers_.AddWithID(wrapper.release(), params.embedded_worker_id);
@@ -117,4 +123,15 @@ void EmbeddedWorkerDispatcher::OnStopWorker(int embedded_worker_id) {
   wrapper->worker()->terminateWorkerContext();
 }
 
+void EmbeddedWorkerDispatcher::OnResumeAfterDownload(int embedded_worker_id) {
+  TRACE_EVENT0("ServiceWorker",
+               "EmbeddedWorkerDispatcher::OnResumeAfterDownload");
+  WorkerWrapper* wrapper = workers_.Lookup(embedded_worker_id);
+  if (!wrapper) {
+    LOG(WARNING) << "Got OnResumeAfterDownload for nonexistent worker";
+    return;
+  }
+  wrapper->worker()->resumeAfterDownload();
+}
+
 }  // namespace content