Use ExtensionRegistry in EventRouter

extensions/browser/event_router.h

 // Copyright (c) 2012 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 EXTENSIONS_BROWSER_EVENT_ROUTER_H_
 #define EXTENSIONS_BROWSER_EVENT_ROUTER_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
+#include "base/scoped_observer.h"
 #include "base/values.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/event_listener_map.h"
+#include "extensions/browser/extension_registry_observer.h"
 #include "extensions/common/event_filtering_info.h"
 #include "ipc/ipc_sender.h"
 
 class GURL;
 class PrefService;
 
 namespace content {
 class BrowserContext;
 class RenderProcessHost;
 }
 
 namespace extensions {
 class ActivityLog;
 class Extension;
 class ExtensionHost;
 class ExtensionPrefs;
+class ExtensionRegistry;
 
 struct Event;
 struct EventDispatchInfo;
 struct EventListenerInfo;
 
 class EventRouter : public content::NotificationObserver,
+                    public ExtensionRegistryObserver,
                     public EventListenerMap::Delegate {
  public:
   // These constants convey the state of our knowledge of whether we're in
   // a user-caused gesture as part of DispatchEvent.
   enum UserGestureState {
     USER_GESTURE_UNKNOWN = 0,
     USER_GESTURE_ENABLED = 1,
     USER_GESTURE_NOT_ENABLED = 2,
   };
 
@@ skipping 146 matching lines @@
       void* browser_context_id,
       const std::string& extension_id,
       const std::string& event_name,
       base::ListValue* event_args,
       UserGestureState user_gesture,
       const extensions::EventFilteringInfo& info);
 
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
+  // ExtensionRegistryObserver implementation.
+  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
+                                 const Extension* extension) OVERRIDE;
+  virtual void OnExtensionUnloaded(
+      content::BrowserContext* browser_context,
+      const Extension* extension,
+      UnloadedExtensionInfo::Reason reason) OVERRIDE;
 
   // Returns true if the given listener map contains a event listeners for
   // the given event. If |extension_id| is non-empty, we also check that that
   // extension is one of the listeners.
   bool HasEventListenerImpl(const ListenerMap& listeners,
                             const std::string& extension_id,
                             const std::string& event_name);
 
   // Shared by DispatchEvent*. If |restrict_to_extension_id| is empty, the
   // event is broadcast.
@@ skipping 65 matching lines @@
   virtual void OnListenerRemoved(const EventListener* listener) OVERRIDE;
 
   content::BrowserContext* browser_context_;
 
   // The ExtensionPrefs associated with |browser_context_|. May be NULL in
   // tests.
   ExtensionPrefs* extension_prefs_;
 
   content::NotificationRegistrar registrar_;
 
+  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   EventListenerMap listeners_;
 
   // Map from base event name to observer.
   typedef base::hash_map<std::string, Observer*> ObserverMap;
   ObserverMap observers_;
 
   DISALLOW_COPY_AND_ASSIGN(EventRouter);
 };
 
 struct Event {
@@ skipping 69 matching lines @@
   const std::string event_name;
 
   const std::string extension_id;
   const GURL listener_url;
   content::BrowserContext* browser_context;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EVENT_ROUTER_H_