Change NotifyAppList*() functions into observers on a ProfileKeyedService.

chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm

Index: chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm b/chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm
index d568b502f7339226ba9e61a663884a3c5b48646a..302fd0728dcce7cc0324472210f5fbea12edbd0f 100644
--- a/chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm
+++ b/chrome/browser/ui/cocoa/app_list/app_list_controller_cocoa.mm
@@ -82,22 +82,4 @@ void ShowAppList(Profile* profile) {
   g_app_list_controller.Get().ShowAppList();
 }
 
-void NotifyAppListOfBeginExtensionInstall(
-    Profile* profile,
-    const std::string& extension_id,
-    const std::string& extension_name,
-    const gfx::ImageSkia& installing_icon) {
-}
-
-void NotifyAppListOfDownloadProgress(
-    Profile* profile,
-    const std::string& extension_id,
-    int percent_downloaded) {
-}
-
-void NotifyAppListOfExtensionInstallFailure(
-    Profile* profile,
-    const std::string& extension_id) {
-}
-
 }  // namespace chrome