DevTools: land service worker handler (patch 1).

content/browser/devtools/worker_devtools_manager.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_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_
 #define CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/observer_list.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 class DevToolsAgentHost;
 class DevToolsAgentHostImpl;
 class WorkerDevToolsAgentHost;
 
 // A base class of SharedWorkerDevToolsManager and ServiceWorkerDevToolsManager,
 // provides common default implementation for them.
 // This class lives on UI thread.
 class CONTENT_EXPORT WorkerDevToolsManager {
  public:
   typedef std::pair<int, int> WorkerId;
 
+  class Observer {
+   public:
+    virtual void WorkerCreated(DevToolsAgentHost* host) {}
+    virtual void WorkerDestroyed(DevToolsAgentHost* host) {}
+
+   protected:
+    virtual ~Observer() {}
+  };
+
   DevToolsAgentHostImpl* GetDevToolsAgentHostForWorker(int worker_process_id,
                                                        int worker_route_id);
   void AddAllAgentHosts(std::vector<scoped_refptr<DevToolsAgentHost>>* result);
   void WorkerReadyForInspection(int worker_process_id, int worker_route_id);
   void WorkerDestroyed(int worker_process_id, int worker_route_id);
 
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
  protected:
-  typedef std::map<WorkerId, WorkerDevToolsAgentHost*> AgentHostMap;
+  using AgentHostMap = std::map<WorkerId, WorkerDevToolsAgentHost*>;
   friend class SharedWorkerDevToolsManagerTest;
 
   WorkerDevToolsManager();
   virtual ~WorkerDevToolsManager();
   void RemoveInspectedWorkerData(WorkerId id);
+  void WorkerCreated(const WorkerId& id,
+                     WorkerDevToolsAgentHost* host);
   void WorkerRestarted(const WorkerId& id, const AgentHostMap::iterator& it);
   AgentHostMap& workers() { return workers_; }
 
  private:
+  // Resets to its initial state as if newly created.
+  void ResetForTesting();
+
+  ObserverList<Observer> observer_list_;
   AgentHostMap workers_;
   DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_WORKER_DEVTOOLS_MANAGER_H_