service worker: Observe when resource context is shutting down

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 <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/service_worker_context.h"
+#include "net/url_request/url_request_context_getter_observer.h"
 
 namespace base {
 class FilePath;
 class SequencedTaskRunner;
 class SingleThreadTaskRunner;
 }
 
 namespace storage {
 class QuotaManagerProxy;
 class SpecialStoragePolicy;
 }
 
 namespace content {
 
 class BrowserContext;
 class ResourceContext;
 class ServiceWorkerContextCore;
 class ServiceWorkerContextObserver;
 class StoragePartitionImpl;
 
 // A refcounted wrapper class for our core object. Higher level content lib
 // classes keep references to this class on mutliple threads. The inner core
 // instance is strictly single threaded and is not refcounted, the core object
 // is what is used internally in the service worker lib.
 class CONTENT_EXPORT ServiceWorkerContextWrapper
     : NON_EXPORTED_BASE(public ServiceWorkerContext),
+      public net::URLRequestContextGetterObserver,
       public base::RefCountedThreadSafe<ServiceWorkerContextWrapper> {
  public:
   using StatusCallback = base::Callback<void(ServiceWorkerStatusCode)>;
   using BoolCallback = base::Callback<void(bool)>;
   using FindRegistrationCallback =
       ServiceWorkerStorage::FindRegistrationCallback;
   using GetRegistrationsInfosCallback =
       ServiceWorkerStorage::GetRegistrationsInfosCallback;
   using GetUserDataCallback = ServiceWorkerStorage::GetUserDataCallback;
   using GetUserDataForAllRegistrationsCallback =
       ServiceWorkerStorage::GetUserDataForAllRegistrationsCallback;
 
   ServiceWorkerContextWrapper(BrowserContext* browser_context);
 
   // Init and Shutdown are for use on the UI thread when the profile,
   // storagepartition is being setup and torn down.
   void Init(const base::FilePath& user_data_directory,
             storage::QuotaManagerProxy* quota_manager_proxy,
             storage::SpecialStoragePolicy* special_storage_policy);
   void Shutdown();
 
+  // Must be called on the IO thread.
+  void InitializeResourceContext(
+      ResourceContext* resource_context,
+      scoped_refptr<net::URLRequestContextGetter> request_context_getter);
+
+  // For net::URLRequestContextGetterObserver
+  void OnContextShuttingDown() override;
+
   // Deletes all files on disk and restarts the system asynchronously. This
   // leaves the system in a disabled state until it's done. This should be
   // called on the IO thread.
   void DeleteAndStartOver();
 
   // The StoragePartition should only be used on the UI thread.
   // Can be null before/during init and during/after shutdown.
   StoragePartitionImpl* storage_partition() const;
 
   void set_storage_partition(StoragePartitionImpl* storage_partition);
 
   // The ResourceContext for the associated BrowserContext. This should only
   // be accessed on the IO thread, and can be null during initialization and
   // shutdown.
   ResourceContext* resource_context();
 
-  void set_resource_context(ResourceContext* resource_context);
-
   // The process manager can be used on either UI or IO.
   ServiceWorkerProcessManager* process_manager() {
     return process_manager_.get();
   }
 
   // ServiceWorkerContext implementation:
   void RegisterServiceWorker(const GURL& pattern,
                              const GURL& script_url,
                              const ResultCallback& continuation) override;
   void UnregisterServiceWorker(const GURL& pattern,
@@ skipping 127 matching lines @@
       const scoped_refptr<content::ServiceWorkerRegistration>& registration);
 
   // 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 scoped_ptr<ServiceWorkerProcessManager> process_manager_;
-  // Cleared in Shutdown():
+  // Cleared in ShutdownOnIO():
   scoped_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_;
 
+  scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
+
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_