Add ref count to service workers for extension API.

content/browser/service_worker/service_worker_context_wrapper.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 94 matching lines @@
       const GURL& url,
       const GURL& other_url,
       const CheckHasServiceWorkerCallback& callback) override;
   void StopAllServiceWorkersForOrigin(const GURL& origin) override;
   void ClearAllServiceWorkersForTest(const base::Closure& callback) override;
   void StartServiceWorkerForNavigationHint(
       const GURL& document_url,
       blink::WebNavigationHintType type,
       int render_process_id,
       const ResultCallback& callback) override;
+  bool IncrementPendingActivity(int64_t service_worker_version_id,
+                                const std::string& request_uuid) override;
+  bool DecrementPendingActivity(int64_t service_worker_version_id,
+                                const std::string& request_uuid) override;
 
   // These methods must only be called from the IO thread.
   ServiceWorkerRegistration* GetLiveRegistration(int64_t registration_id);
   ServiceWorkerVersion* GetLiveVersion(int64_t version_id);
   std::vector<ServiceWorkerRegistrationInfo> GetAllLiveRegistrationInfo();
   std::vector<ServiceWorkerVersionInfo> GetAllLiveVersionInfo();
 
   // Must be called from the IO thread.
   void HasMainFrameProviderHost(const GURL& origin,
                                 const BoolCallback& callback) const;
@@ skipping 64 matching lines @@
   bool OriginHasForeignFetchRegistrations(const GURL& origin);
 
   // Must be called from the UI thread.
   bool IsRunningNavigationHintTask(int render_process_id) const;
 
  private:
   friend class BackgroundSyncManagerTest;
   friend class base::RefCountedThreadSafe<ServiceWorkerContextWrapper>;
   friend class EmbeddedWorkerTestHelper;
   friend class EmbeddedWorkerBrowserTest;
+  friend class ServiceWorkerContext;
   friend class ServiceWorkerDispatcherHost;
   friend class ServiceWorkerInternalsUI;
   friend class ServiceWorkerNavigationHandleCore;
   friend class ServiceWorkerProcessManager;
   friend class ServiceWorkerRequestHandler;
   friend class ServiceWorkerVersionBrowserTest;
   friend class MockServiceWorkerContextWrapper;
 
   ~ServiceWorkerContextWrapper() override;
 
@@ skipping 40 matching lines @@
       scoped_refptr<ServiceWorkerRegistration> registration);
 
   void DidStartServiceWorkerForNavigationHint(const GURL& pattern,
                                               int render_process_id,
                                               const ResultCallback& callback,
                                               ServiceWorkerStatusCode code);
   void DidFinishNavigationHintTaskOnUI(int render_process_id,
                                        const ResultCallback& callback,
                                        bool result);
 
+  void ExternalRequestErrorCallback(int64_t service_worker_version_id,
+                                    const std::string& request_uuid,
+                                    ServiceWorkerStatusCode status);
+
+  // Removes a pending external request identified by |request_uuid|.
+  // Returns true if the request was pending. Also returns |request_id| in that

[falken, 2016/10/03 04:20:31]

"pending" is a bit confusing since by definition in the first sentence it's a
pending request. Maybe "if the request was found"?

[lazyboy, 2016/10/04 02:42:52]

Done.

+  // case.
+  bool RemovePendingExternalRequest(int64_t service_worker_version_id,
+                                    const std::string& request_uuid,
+                                    int* request_id);
+
   // The core context is only for use on the IO thread.
   // Can be null before/during init, during/after shutdown, and after
   // DeleteAndStartOver fails.
   ServiceWorkerContextCore* context();
 
   const scoped_refptr<base::ObserverListThreadSafe<
       ServiceWorkerContextObserver>> observer_list_;
   const std::unique_ptr<ServiceWorkerProcessManager> process_manager_;
   // Cleared in ShutdownOnIO():
   std::unique_ptr<ServiceWorkerContextCore> context_core_;
 
   // Initialized in Init(); true if the user data directory is empty.
   bool is_incognito_;
 
   // Raw pointer to the StoragePartitionImpl owning |this|.
   StoragePartitionImpl* storage_partition_;
 
   // The ResourceContext associated with this context.
   ResourceContext* resource_context_;
 
   // Must be touched on the UI thread.
   std::map<int, int> navigation_hint_task_count_per_process_;
 
+  // Container for pending external requests of a service worker.
+  // Each request is (key, value): (request uuid, request id).
+  using RequestUUIDToRequestID = std::map<std::string, int>;
+  // Maps service worker version id -> RequestUUIDToRequestID.
+  // IO thread.
+  std::map<int64_t, RequestUUIDToRequestID> pending_external_requests_;
+
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_