Teach EmbeddedWorkerInstance to create a process when it needs one.

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 <vector>
+
 #include "base/files/file_path.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"
 
 namespace base {
 class FilePath;
 }
 
 namespace quota {
 class QuotaManagerProxy;
 }
 
 namespace content {
 
+class BrowserContext;
+class ServiceWorkerContextCore;
 class ServiceWorkerContextObserver;
 
 // 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 base::RefCountedThreadSafe<ServiceWorkerContextWrapper> {
  public:
-  ServiceWorkerContextWrapper();
+  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,
             quota::QuotaManagerProxy* quota_manager_proxy);
   void Shutdown();
 
   // The core context is only for use on the IO thread.
   ServiceWorkerContextCore* context();
 
   // ServiceWorkerContext implementation:
-  virtual void RegisterServiceWorker(const GURL& pattern,
-                                     const GURL& script_url,
-                                     int source_process_id,
-                                     const ResultCallback& continuation)
-      OVERRIDE;
-
+  virtual void RegisterServiceWorker(
+      const GURL& pattern,
+      const GURL& script_url,
+      const ResultCallback& continuation) OVERRIDE;
   virtual void UnregisterServiceWorker(const GURL& pattern,
                                        int source_process_id,
                                        const ResultCallback& continuation)
       OVERRIDE;
 
   void AddObserver(ServiceWorkerContextObserver* observer);
   void RemoveObserver(ServiceWorkerContextObserver* observer);
 
  private:
   friend class base::RefCountedThreadSafe<ServiceWorkerContextWrapper>;
+  friend class ServiceWorkerProcessManager;
   virtual ~ServiceWorkerContextWrapper();
 
+  const scoped_refptr<ObserverListThreadSafe<ServiceWorkerContextObserver> >
+      observer_list_;
+  // Cleared in Shutdown():
+  BrowserContext* browser_context_;
   scoped_ptr<ServiceWorkerContextCore> context_core_;
-  scoped_refptr<ObserverListThreadSafe<ServiceWorkerContextObserver> >
-      observer_list_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_WRAPPER_H_