Use ExtensionRegistryObserver instead of deprecated extension notification from autocomplete

chrome/browser/autocomplete/extension_app_provider.cc

Index: chrome/browser/autocomplete/extension_app_provider.cc
diff --git a/chrome/browser/autocomplete/extension_app_provider.cc b/chrome/browser/autocomplete/extension_app_provider.cc
index f29b991841390e2b58a5dd148d688a9b75686a47..d6d0b7c918b45a6d484b287867c137708342b104 100644
--- a/chrome/browser/autocomplete/extension_app_provider.cc
+++ b/chrome/browser/autocomplete/extension_app_provider.cc
@@ -29,16 +29,21 @@
 ExtensionAppProvider::ExtensionAppProvider(
     AutocompleteProviderListener* listener,
     Profile* profile)
-    : AutocompleteProvider(listener, profile,
-          AutocompleteProvider::TYPE_EXTENSION_APP) {
+    : AutocompleteProvider(listener,
+                           profile,
+                           AutocompleteProvider::TYPE_EXTENSION_APP),
+      extension_registry_observer_(this) {
   // Notifications of extensions loading and unloading always come from the
   // non-incognito profile, but we need to see them regardless, as the incognito
   // windows can be affected.
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_EXTENSION_LOADED_DEPRECATED,
-                 content::Source<Profile>(profile_->GetOriginalProfile()));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
                  content::Source<Profile>(profile_->GetOriginalProfile()));
+
+  // ExtensionRegistryObserver will handle getting the original profile itself
+  // as necessary.
+  extension_registry_observer_.Add(
+      extensions::ExtensionRegistry::Get(profile_));
+
   RefreshAppList();
 }
 
@@ -183,9 +188,16 @@ void ExtensionAppProvider::RefreshAppList() {
   }
 }
 
+void ExtensionAppProvider::OnExtensionLoaded(
+    content::BrowserContext* browser_context,
+    const extensions::Extension* extension) {
+  RefreshAppList();
+}
+
 void ExtensionAppProvider::Observe(int type,
                                    const content::NotificationSource& source,
                                    const content::NotificationDetails& details) {
+  DCHECK_EQ(chrome::NOTIFICATION_EXTENSION_UNINSTALLED, type);
   RefreshAppList();
 }