service worker: Add net_log for fetch event dispatch

content/browser/service_worker/service_worker_fetch_dispatcher.h

Index: content/browser/service_worker/service_worker_fetch_dispatcher.h
diff --git a/content/browser/service_worker/service_worker_fetch_dispatcher.h b/content/browser/service_worker/service_worker_fetch_dispatcher.h
index c1cd3ed4eb92728fc060b3a0230cd3d61e9af8fe..41bf9219c06a40657b54896ef377e68127d24049 100644
--- a/content/browser/service_worker/service_worker_fetch_dispatcher.h
+++ b/content/browser/service_worker/service_worker_fetch_dispatcher.h
@@ -13,6 +13,7 @@
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/common/resource_type.h"
+#include "net/log/net_log.h"
 
 namespace content {
 
@@ -31,30 +32,41 @@ class CONTENT_EXPORT ServiceWorkerFetchDispatcher {
       std::unique_ptr<ServiceWorkerFetchRequest> request,
       ServiceWorkerVersion* version,
       ResourceType resource_type,
+      const net::BoundNetLog& net_log,
       const base::Closure& prepare_callback,
       const FetchCallback& fetch_callback);
   ~ServiceWorkerFetchDispatcher();
 
   // Dispatches a fetch event to the |version| given in ctor, and fires
-  // |callback| (also given in ctor) when finishes.
+  // |fetch_callback| (also given in ctor) when finishes. It runs
+  // |prepare_callback| as an intermediate step once the version is activated
+  // and running.
   void Run();
 
  private:
+  void DidWaitForActivation();
   void StartWorker();
+  void DidStartWorker();
+  void DidFailToStartWorker(ServiceWorkerStatusCode status);
   void DispatchFetchEvent();
-  void DidPrepare();
+  void DidFailToDispatch(ServiceWorkerStatusCode status);
   void DidFail(ServiceWorkerStatusCode status);
   void DidFinish(int request_id,
                  ServiceWorkerFetchEventResult fetch_result,
                  const ServiceWorkerResponse& response);
+  void Complete(ServiceWorkerStatusCode status,
+                ServiceWorkerFetchEventResult fetch_result,
+                const ServiceWorkerResponse& response);
 
   ServiceWorkerMetrics::EventType GetEventType() const;
 
   scoped_refptr<ServiceWorkerVersion> version_;
+  net::BoundNetLog net_log_;
   base::Closure prepare_callback_;
   FetchCallback fetch_callback_;
   std::unique_ptr<ServiceWorkerFetchRequest> request_;
   ResourceType resource_type_;
+  bool did_complete_;
   base::WeakPtrFactory<ServiceWorkerFetchDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerFetchDispatcher);