Change event routers from singletons to being owned by the ExtensionService.

chrome/browser/extensions/extension_processes_api.h

 // Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESSES_API_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESSES_API_H__
 #pragma once
 
 #include <set>
 #include <string>
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/task_manager/task_manager.h"
 #include "content/common/notification_registrar.h"
 
+class Profile;
+
 // Observes the Task Manager and routes the notifications as events to the
 // extension system.
 class ExtensionProcessesEventRouter : public TaskManagerModelObserver {
  public:
-  // Single instance of the event router.
-  static ExtensionProcessesEventRouter* GetInstance();
+  explicit ExtensionProcessesEventRouter(Profile* profile);
+  virtual ~ExtensionProcessesEventRouter();
 
-  // Safe to call multiple times.
-  void ObserveProfile(Profile* profile);
+  void Init();
 
   // Called when an extension process wants to listen to process events.
   void ListenerAdded();
 
   // Called when an extension process with a listener exits or removes it.
   void ListenerRemoved();
 
  private:
-  friend struct DefaultSingletonTraits<ExtensionProcessesEventRouter>;
-
-  ExtensionProcessesEventRouter();
-  virtual ~ExtensionProcessesEventRouter();
 
   // TaskManagerModelObserver methods.
   virtual void OnModelChanged() {}
   virtual void OnItemsChanged(int start, int length);
   virtual void OnItemsAdded(int start, int length) {}
   virtual void OnItemsRemoved(int start, int length) {}
 
   void DispatchEvent(Profile* profile,
                      const char* event_name,
                      const std::string& json_args);
 
   // Used for tracking registrations to process related notifications.
   NotificationRegistrar registrar_;
 
-  // Registered profiles.
-  typedef std::set<Profile*> ProfileSet;
-  ProfileSet profiles_;
+  // The associated Profile owns us transitively via ExtensionService.
+  Profile* profile_;
 
   // TaskManager to observe for updates.
   TaskManagerModel* model_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessesEventRouter);
 };
 
 
 // This extension function returns the Process object for the renderer process
 // currently in use by the specified Tab.
 class GetProcessIdForTabFunction : public SyncExtensionFunction {
   virtual ~GetProcessIdForTabFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.processes.getProcessIdForTab")
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESSES_API_H__