make "reload" on chrome://extensions automatically relaunch running apps

chrome/browser/ui/webui/extensions/extension_settings_handler.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_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
 #include "chrome/browser/extensions/extension_warning_set.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 74 matching lines @@
                             int index, void* params) OVERRIDE;
   virtual void MultiFilesSelected(
       const std::vector<FilePath>& files, void* params) OVERRIDE;
   virtual void FileSelectionCanceled(void* params) OVERRIDE {}
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Launches the application described by |extension_id|.
+  void LaunchApplication(extensions::ExtensionHost* extension_host);
+
   // ExtensionUninstallDialog::Delegate implementation, used for receiving
   // notification about uninstall confirmation dialog selections.
   virtual void ExtensionUninstallAccepted() OVERRIDE;
   virtual void ExtensionUninstallCanceled() OVERRIDE;
 
   // Helper method that reloads all unpacked extensions.
   void ReloadUnpackedExtensions();
 
+  // Reloads the given extension.
+  void ReloadExtension(const extensions::Extension* extension);
+
   // Callback for "requestExtensionsData" message.
   void HandleRequestExtensionsData(const base::ListValue* args);
 
   // Callback for "toggleDeveloperMode" message.
   void HandleToggleDeveloperMode(const base::ListValue* args);
 
   // Callback for "inspect" message.
   void HandleInspectMessage(const base::ListValue* args);
 
   // Callback for "reload" message.
@@ skipping 80 matching lines @@
   // it is removed from the process). Keep a pointer to it so we can exclude
   // it from the active views.
   content::RenderViewHost* deleting_rvh_;
 
   // We want to register for notifications only after we've responded at least
   // once to the page, otherwise we'd be calling JavaScript functions on objects
   // that don't exist yet when notifications come in. This variable makes sure
   // we do so only once.
   bool registered_for_notifications_;
 
+  // The set of apps for which we have triggered reload. They will be
+  // re-launched when loaded again. The boolean tracks whether they have been
+  // enabled (whether NOTIFICATION_EXTENSION_ENABLED has been dispatched). This
+  // hack is necessary because reloading an extension causes multiple LOADED
+  // notifications, but we only care about the one that comes after ENABLED.
+  typedef std::map<std::string, bool> RelaunchApps;
+  RelaunchApps relaunch_app_ids_;
+
   content::NotificationRegistrar registrar_;
 
   PrefChangeRegistrar pref_registrar_;
   PrefChangeRegistrar local_state_pref_registrar_;
 
+  base::WeakPtrFactory<ExtensionSettingsHandler> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_