Add basic browser test for EmbeddedWorker/ServiceWorker

content/browser/service_worker/embedded_worker_instance.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_EMBEDDED_WORKER_INSTANCE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
+#include "base/observer_list.h"
 #include "content/common/content_export.h"
 
 class GURL;
 
 namespace content {
 
 class EmbeddedWorkerRegistry;
 struct ServiceWorkerFetchRequest;
 
 // This gives an interface to control one EmbeddedWorker instance, which
 // may be 'in-waiting' or running in one of the child processes added by
 // AddProcessReference().
 class CONTENT_EXPORT EmbeddedWorkerInstance {
  public:
   enum Status {
     STOPPED,
     STARTING,
     RUNNING,
     STOPPING,
   };
 
+  class Observer {
+   public:
+    virtual ~Observer() {}
+    virtual void OnStarted() = 0;
+    virtual void OnStopped() = 0;
+  };
+
   ~EmbeddedWorkerInstance();
 
   // Starts the worker. It is invalid to call this when the worker is
   // not in STOPPED status.
   // This returns false if starting a worker fails immediately, e.g. when
   // IPC couldn't be sent to the worker or no process was available.
   bool Start(int64 service_worker_version_id,
              const GURL& script_url);
 
   // Stops the worker. It is invalid to call this when the worker is
@@ skipping 10 matching lines @@
   // Add or remove |process_id| to the internal process set where this
   // worker can be started.
   void AddProcessReference(int process_id);
   void ReleaseProcessReference(int process_id);
 
   int embedded_worker_id() const { return embedded_worker_id_; }
   Status status() const { return status_; }
   int process_id() const { return process_id_; }
   int thread_id() const { return thread_id_; }
 
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
  private:
   friend class EmbeddedWorkerRegistry;
   FRIEND_TEST_ALL_PREFIXES(EmbeddedWorkerInstanceTest, StartAndStop);
 
   typedef std::map<int, int> ProcessRefMap;
 
   // Constructor is called via EmbeddedWorkerRegistry::CreateWorker().
   // This instance holds a ref of |registry|.
   EmbeddedWorkerInstance(EmbeddedWorkerRegistry* registry,
                          int embedded_worker_id);
@@ skipping 16 matching lines @@
 
   scoped_refptr<EmbeddedWorkerRegistry> registry_;
   const int embedded_worker_id_;
   Status status_;
 
   // Current running information. -1 indicates the worker is not running.
   int process_id_;
   int thread_id_;
 
   ProcessRefMap process_refs_;
+  ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerInstance);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_