Use ExtensionRegistryObserver instead of deprecated extension notification from c/b/extension

chrome/browser/extensions/api/commands/command_service.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 CHROME_BROWSER_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/scoped_observer.h"
 #include "chrome/common/extensions/command.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_source.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
+#include "extensions/browser/extension_registry_observer.h"
 #include "extensions/common/extension.h"
 
 class Profile;
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace content {
 class BrowserContext;
 }
 
 namespace ui {
 class Accelerator;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace extensions {
+class ExtensionRegistry;
 
 // This service keeps track of preferences related to extension commands
 // (assigning initial keybindings on install and removing them on deletion
 // and answers questions related to which commands are active.
 class CommandService : public BrowserContextKeyedAPI,
-                       public content::NotificationObserver {
+                       public ExtensionRegistryObserver {
  public:
   // An enum specifying whether to fetch all extension commands or only active
   // ones.
   enum QueryType {
     ALL,
     ACTIVE_ONLY,
   };
 
   // An enum specifying whether the command is global in scope or not. Global
   // commands -- unlike regular commands -- have a global keyboard hook
@@ skipping 19 matching lines @@
   virtual ~CommandService();
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<CommandService>* GetFactoryInstance();
 
   // Convenience method to get the CommandService for a profile.
   static CommandService* Get(content::BrowserContext* context);
 
   // Returns true if |extension| is permitted to and does remove the bookmark
   // shortcut key.
-  static bool RemovesBookmarkShortcut(const extensions::Extension* extension);
+  static bool RemovesBookmarkShortcut(const Extension* extension);
 
   // Returns true if |extension| is permitted to and does remove the bookmark
   // open pages shortcut key.
-  static bool RemovesBookmarkOpenPagesShortcut(
-      const extensions::Extension* extension);
+  static bool RemovesBookmarkOpenPagesShortcut(const Extension* extension);
 
   // Gets the command (if any) for the browser action of an extension given
   // its |extension_id|. The function consults the master list to see if
   // the command is active. Returns false if the extension has no browser
   // action. Returns false if the command is not active and |type| requested
   // is ACTIVE_ONLY. |command| contains the command found and |active| (if not
   // NULL) contains whether |command| is active.
   bool GetBrowserActionCommand(const std::string& extension_id,
                                QueryType type,
-                               extensions::Command* command,
+                               Command* command,
                                bool* active) const;
 
   // Gets the command (if any) for the page action of an extension given
   // its |extension_id|. The function consults the master list to see if
   // the command is active. Returns false if the extension has no page
   // action. Returns false if the command is not active and |type| requested
   // is ACTIVE_ONLY. |command| contains the command found and |active| (if not
   // NULL) contains whether |command| is active.
   bool GetPageActionCommand(const std::string& extension_id,
                             QueryType type,
-                            extensions::Command* command,
+                            Command* command,
                             bool* active) const;
 
   // Gets the active named commands (if any) for the extension with
   // |extension_id|. The function consults the master list to see if the
   // commands are active. Returns an empty map if the extension has no named
   // commands of the right |scope| or no such active named commands when |type|
   // requested is ACTIVE_ONLY.
   bool GetNamedCommands(const std::string& extension_id,
                         QueryType type,
                         CommandScope scope,
-                        extensions::CommandMap* command_map) const;
+                        CommandMap* command_map) const;
 
   // Records a keybinding |accelerator| as active for an extension with id
   // |extension_id| and command with the name |command_name|. If
   // |allow_overrides| is false, the keybinding must be free for the change to
   // be recorded (as determined by the master list in |user_prefs|). If
   // |allow_overwrites| is true, any previously recorded keybinding for this
   // |accelerator| will be overwritten. If |global| is true, the command will
   // be registered as a global command (be active even when Chrome does not have
   // focus. Returns true if the change was successfully recorded.
   bool AddKeybindingPref(const ui::Accelerator& accelerator,
@@ skipping 26 matching lines @@
   // |extension_id| . Returns an empty Command object (with keycode
   // VKEY_UNKNOWN) if the command is not found.
   Command FindCommandByName(const std::string& extension_id,
                             const std::string& command) const;
 
   // If the extension with |extension_id| binds a command to |accelerator|,
   // returns true and assigns *|command| and *|command_type| to the command and
   // its type if non-NULL.
   bool GetBoundExtensionCommand(const std::string& extension_id,
                                 const ui::Accelerator& accelerator,
-                                extensions::Command* command,
+                                Command* command,
                                 ExtensionCommandType* command_type) const;
 
   // Returns true if |extension| is permitted to and does override the bookmark
   // shortcut key.
-  bool OverridesBookmarkShortcut(const extensions::Extension* extension) const;
-
-  // Overridden from content::NotificationObserver.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
+  bool OverridesBookmarkShortcut(const Extension* extension) const;
 
  private:
   friend class BrowserContextKeyedAPIFactory<CommandService>;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
     return "CommandService";
   }
   static const bool kServiceRedirectedInIncognito = true;
 
+  // ExtensionRegistryObserver.
+  virtual void OnExtensionWillBeInstalled(
+      content::BrowserContext* browser_context,
+      const Extension* extension,
+      bool is_update,
+      bool from_ephemeral,
+      const std::string& old_name) OVERRIDE;
+  virtual void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                                      const Extension* extension) OVERRIDE;
+
   // Assigns initial keybinding for a given |extension|'s page action, browser
   // action and named commands. In each case, if the suggested keybinding is
   // free, it will be taken by this extension. If not, that keybinding request
   // is ignored. |user_pref| is the PrefService used to record the new
   // keybinding assignment.
-  void AssignInitialKeybindings(const extensions::Extension* extension);
+  void AssignInitialKeybindings(const Extension* extension);
 
   bool GetExtensionActionCommand(const std::string& extension_id,
                                  QueryType query_type,
-                                 extensions::Command* command,
+                                 Command* command,
                                  bool* active,
                                  ExtensionCommandType action_type) const;
 
-  // The content notification registrar for listening to extension events.
-  content::NotificationRegistrar registrar_;
-
   // A weak pointer to the profile we are associated with. Not owned by us.
   Profile* profile_;
 
+  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   DISALLOW_COPY_AND_ASSIGN(CommandService);
 };
 
 template <>
 void
     BrowserContextKeyedAPIFactory<CommandService>::DeclareFactoryDependencies();
 
 }  //  namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_