Restart running apps when chrome restarts.

chrome/browser/extensions/app_restore_service.cc

+// 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.
+
+#include "chrome/browser/extensions/app_restore_service.h"
+
+#include "chrome/browser/extensions/api/app_runtime/app_runtime_api.h"
+#include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_host.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prefs/scoped_user_pref_update.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_set.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+
+namespace extensions {
+
+AppRestoreService::AppRestoreService(Profile* profile)
+    : profile_(profile) {
+  registrar_.Add(
+      this, chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
+      content::NotificationService::AllSources());
+  registrar_.Add(
+      this, chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED,
+      content::NotificationService::AllSources());
+  registrar_.Add(
+      this, content::NOTIFICATION_APP_TERMINATING,
+      content::NotificationService::AllSources());
+}
+
+void AppRestoreService::RestoreApps() {
+  ExtensionService* extension_service =
+      ExtensionSystem::Get(profile_)->extension_service();
+  const ExtensionSet* extensions = extension_service->extensions();
+  ExtensionPrefs* extension_prefs = extension_service->extension_prefs();
+
+  for (ExtensionSet::const_iterator it = extensions->begin();
+       it != extensions->end(); ++it) {
+    const Extension* extension = *it;
+    if (extension_prefs->IsExtensionRunning(extension->id()))
+      RestoreApp(extension->id());

[Mihai Parparita -not on Chrome, 2012/09/06 23:07:09]

Given that RestoreApp then looks up the Extension instance by ID, you might as
well just pass it in.

[koz (OOO until 15th September), 2012/09/10 04:51:57]

Done.

+    else
+      extension_prefs->SetExtensionRunning(extension->id(), false);

[Mihai Parparita -not on Chrome, 2012/09/06 23:07:09]

Not sure I understand the need for this. It seems like the extension is already
marked as not running.

[koz (OOO until 15th September), 2012/09/10 04:51:57]

Oh, yeah. Silly mistake.

+  }
+}
+
+void AppRestoreService::Observe(int type,
+                                const content::NotificationSource& source,
+                                const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING: {
+      ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+      if (host->extension()->is_platform_app()) {
+        RecordAppStart(host->extension()->id());
+      }
+      break;
+    }
+
+    case chrome::NOTIFICATION_EXTENSION_HOST_DESTROYED: {
+      ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+      if (host->extension()->is_platform_app()) {
+        RecordAppStop(host->extension()->id());
+      }
+      break;
+    }
+
+    case content::NOTIFICATION_APP_TERMINATING: {
+      // Stop listening to NOTIFICATION_EXTENSION_HOST_DESTROYED in particular
+      // as all extension hosts will be destroyed as a result of shutdown.
+      registrar_.RemoveAll();
+      break;
+    }
+  }
+}
+
+
+void AppRestoreService::RecordAppStart(const std::string& extension_id) {
+  ExtensionPrefs* extension_prefs =
+      ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
+  extension_prefs->SetExtensionRunning(extension_id, true);
+}
+
+void AppRestoreService::RecordAppStop(const std::string& extension_id) {
+  ExtensionPrefs* extension_prefs =
+      ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
+  extension_prefs->SetExtensionRunning(extension_id, false);
+}
+
+void AppRestoreService::RestoreApp(const std::string& extension_id) {
+  const Extension* extension = ExtensionSystem::Get(profile_)->
+      extension_service()->extensions()->GetByID(extension_id);
+  AppEventRouter::DispatchOnRestartedEvent(profile_, extension);
+}
+
+}  // namespace extensions