Add a non-blocking "OneShotEvent" class

chrome/browser/extensions/extension_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_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 20 matching lines @@
 #include "chrome/browser/extensions/menu_manager.h"
 #include "chrome/browser/extensions/pending_extension_manager.h"
 #include "chrome/browser/extensions/process_map.h"
 #include "chrome/browser/extensions/update_observer.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/common/extensions/manifest.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "extensions/common/one_shot_event.h"
 #include "sync/api/string_ordinal.h"
 #include "sync/api/sync_change.h"
 #include "sync/api/syncable_service.h"
 
 class CommandLine;
 class ExtensionErrorUI;
 class ExtensionSyncData;
 class ExtensionToolbarModel;
 class GURL;
 class Profile;
@@ skipping 141 matching lines @@
                                        const std::string& extension_id);
 
   // Constructor stores pointers to |profile| and |extension_prefs| but
   // ownership remains at caller.
   ExtensionService(Profile* profile,
                    const CommandLine* command_line,
                    const base::FilePath& install_directory,
                    extensions::ExtensionPrefs* extension_prefs,
                    extensions::Blacklist* blacklist,
                    bool autoupdate_enabled,
-                   bool extensions_enabled);
+                   bool extensions_enabled,
+                   extensions::OneShotEvent* ready);
 
   virtual ~ExtensionService();
 
   // Gets the list of currently installed extensions.
   virtual const ExtensionSet* extensions() const OVERRIDE;
   virtual const ExtensionSet* disabled_extensions() const OVERRIDE;
   const ExtensionSet* terminated_extensions() const;
   const ExtensionSet* blacklisted_extensions() const;
 
   // Returns a set of all installed, disabled, blacklisted, and terminated
@@ skipping 484 matching lines @@
 
   struct NaClModuleInfo {
     NaClModuleInfo();
     ~NaClModuleInfo();
 
     GURL url;
     std::string mime_type;
   };
   typedef std::list<NaClModuleInfo> NaClModuleInfoList;
 
-  // Sets the ready_ flag and sends a notification to the listeners.
+  // Signals *ready_ and sends a notification to the listeners.
   void SetReadyAndNotifyListeners();
 
   // Return true if the sync type of |extension| matches |type|.
   bool IsCorrectSyncType(const extensions::Extension& extension,
                          syncer::ModelType type)
       const;
 
   void OnExtensionInstallPrefChanged();
 
   // Handles setting the extension specific values in |extension_sync_data| to
@@ skipping 174 matching lines @@
   // Whether to notify users when they attempt to install an extension.
   bool show_extensions_prompts_;
 
   // Whether to delay installing of extension updates until the extension is
   // idle.
   bool install_updates_when_idle_;
 
   // Used by dispatchers to limit API quota for individual extensions.
   ExtensionsQuotaService quota_service_;
 
-  // Record that Init() has been called, and chrome::EXTENSIONS_READY
-  // has fired.
-  bool ready_;
+  // Signaled when all extensions are loaded.
+  extensions::OneShotEvent* const ready_;
 
   // Our extension updater, if updates are turned on.
   scoped_ptr<extensions::ExtensionUpdater> updater_;
 
   // The model that tracks extensions with BrowserAction buttons.
   ExtensionToolbarModel toolbar_model_;
 
   // Map unloaded extensions' ids to their paths. When a temporarily loaded
   // extension is unloaded, we lose the information about it and don't have
   // any in the extension preferences file.
@@ skipping 82 matching lines @@
   ObserverList<extensions::UpdateObserver, true> update_observers_;
 
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsAndCheckStorageProtection);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_