ServiceWorker: Insert TRACE_EVENT to watch a breakdown of the ServiceWorker's performance on chome:…

content/renderer/service_worker/service_worker_script_context.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/service_worker/service_worker_script_context.h"
 
 #include <map>
 
+#include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "content/renderer/service_worker/embedded_worker_context_client.h"
 #include "ipc/ipc_message.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerRequest.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
@@ skipping 102 matching lines @@
 
 void ServiceWorkerScriptContext::Send(IPC::Message* message) {
   embedded_context_->Send(message);
 }
 
 int ServiceWorkerScriptContext::GetRoutingID() const {
   return embedded_context_->embedded_worker_id();
 }
 
 void ServiceWorkerScriptContext::OnActivateEvent(int request_id) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnActivateEvent");
   proxy_->dispatchActivateEvent(request_id);
 }
 
 void ServiceWorkerScriptContext::OnInstallEvent(int request_id,
                                                 int active_version_id) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnInstallEvent");
   proxy_->dispatchInstallEvent(request_id);
 }
 
 void ServiceWorkerScriptContext::OnFetchEvent(
     int request_id,
     const ServiceWorkerFetchRequest& request) {
   blink::WebServiceWorkerRequest webRequest;
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnFetchEvent");
   webRequest.setURL(blink::WebURL(request.url));
   webRequest.setMethod(blink::WebString::fromUTF8(request.method));
   for (std::map<std::string, std::string>::const_iterator it =
            request.headers.begin();
        it != request.headers.end();
        ++it) {
     webRequest.setHeader(blink::WebString::fromUTF8(it->first),
                          blink::WebString::fromUTF8(it->second));
   }
   if (!request.blob_uuid.empty()) {
     webRequest.setBlob(blink::WebString::fromUTF8(request.blob_uuid),
                        request.blob_size);
   }
   webRequest.setReferrer(blink::WebString::fromUTF8(request.referrer.spec()),
                          blink::WebReferrerPolicyDefault);
   webRequest.setIsReload(request.is_reload);
   proxy_->dispatchFetchEvent(request_id, webRequest);
 }
 
 void ServiceWorkerScriptContext::OnSyncEvent(int request_id) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnSyncEvent");
   proxy_->dispatchSyncEvent(request_id);
 }
 
 void ServiceWorkerScriptContext::OnPushEvent(int request_id,
                                              const std::string& data) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnPushEvent");
   proxy_->dispatchPushEvent(request_id, blink::WebString::fromUTF8(data));
   Send(new ServiceWorkerHostMsg_PushEventFinished(
       GetRoutingID(), request_id));
 }
 
 void ServiceWorkerScriptContext::OnPostMessage(
     const base::string16& message,
     const std::vector<int>& sent_message_port_ids,
     const std::vector<int>& new_routing_ids) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnPostEvent");
   std::vector<WebMessagePortChannelImpl*> ports;
   if (!sent_message_port_ids.empty()) {
     base::MessageLoopProxy* loop_proxy = embedded_context_->main_thread_proxy();
     ports.resize(sent_message_port_ids.size());
     for (size_t i = 0; i < sent_message_port_ids.size(); ++i) {
       ports[i] = new WebMessagePortChannelImpl(
           new_routing_ids[i], sent_message_port_ids[i], loop_proxy);
     }
   }
 
   proxy_->dispatchMessageEvent(message, ports);
 }
 
 void ServiceWorkerScriptContext::OnDidGetClientDocuments(
     int request_id, const std::vector<int>& client_ids) {
+  TRACE_EVENT0("ServiceWorker",
+               "ServiceWorkerScriptContext::OnDidGetClientDocuments");
   blink::WebServiceWorkerClientsCallbacks* callbacks =
       pending_clients_callbacks_.Lookup(request_id);
   if (!callbacks) {
     NOTREACHED() << "Got stray response: " << request_id;
     return;
   }
   scoped_ptr<blink::WebServiceWorkerClientsInfo> info(
       new blink::WebServiceWorkerClientsInfo);
   info->clientIDs = client_ids;
   callbacks->onSuccess(info.release());
   pending_clients_callbacks_.Remove(request_id);
 }
 
 }  // namespace content