Add ref count to service workers for extension API.

content/public/browser/service_worker_context.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 
 #include <set>
 #include <string>
 
 #include "base/callback_forward.h"
 #include "content/public/browser/service_worker_usage_info.h"
 #include "url/gurl.h"
 
 namespace content {
 
+class StoragePartition;
+
 // Represents the per-StoragePartition ServiceWorker data.
 class ServiceWorkerContext {
  public:
   // https://rawgithub.com/slightlyoff/ServiceWorker/master/spec/service_worker/index.html#url-scope:
   // roughly, must be of the form "<origin>/<path>/*".
   typedef GURL Scope;
 
   typedef base::Callback<void(bool success)> ResultCallback;
 
   typedef base::Callback<void(const std::vector<ServiceWorkerUsageInfo>&
                                   usage_info)> GetUsageInfoCallback;
 
   typedef base::Callback<void(bool has_service_worker)>
       CheckHasServiceWorkerCallback;
 
   // Registers the header name which should not be passed to the ServiceWorker.
   // Must be called from the IO thread.
   CONTENT_EXPORT static void AddExcludedHeadersForFetchEvent(
       const std::set<std::string>& header_names);
 
   // Returns true if the header name should not be passed to the ServiceWorker.
   // Must be called from the IO thread.
   static bool IsExcludedHeaderNameForFetchEvent(const std::string& header_name);
 
+  CONTENT_EXPORT static void IncrementEmbeddedWorkerRefCount(
+      StoragePartition* storage_partition,
+      int embedded_worker_id);
+  CONTENT_EXPORT static void DecrementEmbeddedWorkerRefCount(
+      StoragePartition* storage_partition,
+      int embedded_worker_id);
+
   // Equivalent to calling navigator.serviceWorker.register(script_url, {scope:
   // pattern}) from a renderer, except that |pattern| is an absolute URL instead
   // of relative to some current origin.  |callback| is passed true when the JS
   // promise is fulfilled or false when the JS promise is rejected.
   //
   // The registration can fail if:
   //  * |script_url| is on a different origin from |pattern|
   //  * Fetching |script_url| fails.
   //  * |script_url| fails to parse or its top-level execution fails.
   //    TODO: The error message for this needs to be available to developers.
@@ skipping 55 matching lines @@
   virtual void ClearAllServiceWorkersForTest(const base::Closure& callback) = 0;
 
  protected:
   ServiceWorkerContext() {}
   virtual ~ServiceWorkerContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_