Add a ServiceWorkerContextObserver to content's public 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>
 #include <string>
 #include <vector>
 
-#include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/observer_list.h"
+#include "base/observer_list_threadsafe.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
+#include "content/browser/service_worker/service_worker_context_core_observer.h"
 #include "content/common/content_export.h"
 #include "content/common/worker_url_loader_factory_provider.mojom.h"
 #include "content/public/browser/service_worker_context.h"
 
 namespace base {
 class FilePath;
 class SingleThreadTaskRunner;
 }
 
 namespace storage {
 class QuotaManagerProxy;
 class SpecialStoragePolicy;
 }
 
 namespace content {
 
 class BrowserContext;
 class ResourceContext;
-class ServiceWorkerContextCore;
-class ServiceWorkerContextCoreObserver;
+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 ServiceWorkerContextCoreObserver,
       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 =
@@ skipping 25 matching lines @@
   // 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();
 
   // The process manager can be used on either UI or IO.
   ServiceWorkerProcessManager* process_manager() {
     return process_manager_.get();
   }
 
+  // ServiceWorkerContextCoreObserver implementation:
+  void OnRegistrationStored(int64_t registration_id,
+                            const GURL& pattern) override;
+
   // ServiceWorkerContext implementation:
+  void AddObserver(ServiceWorkerContextObserver* observer) override;
+  void RemoveObserver(ServiceWorkerContextObserver* observer) override;
   void RegisterServiceWorker(const GURL& pattern,
                              const GURL& script_url,
                              const ResultCallback& continuation) override;
   void UnregisterServiceWorker(const GURL& pattern,
                                const ResultCallback& continuation) override;
   void GetAllOriginsInfo(const GetUsageInfoCallback& callback) override;
   void DeleteForOrigin(const GURL& origin,
                        const ResultCallback& callback) override;
   void CheckHasServiceWorker(
       const GURL& url,
@@ skipping 175 matching lines @@
 
   void DidFindRegistrationForUpdate(
       ServiceWorkerStatusCode status,
       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();
 
+  // Observers of |context_core_| which live within content's implementation
+  // boundary. Shared with |context_core_|.
   const scoped_refptr<
       base::ObserverListThreadSafe<ServiceWorkerContextCoreObserver>>
       core_observer_list_;
+
+  // Observers which live outside content's implementation boundary. Observer
+  // methods will always be dispatched on the UI thread.
+  base::ObserverList<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_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_