Remove SigninDelegateObserver.

chrome/browser/ui/app_list/app_list_view_delegate.cc

Index: chrome/browser/ui/app_list/app_list_view_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index 699697c4dfdd03863856e1ac6d514cc282bd8331..e53fa9bdd092c35d14cd52b1973d63fc9a93da9b 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -69,8 +69,6 @@ AppListViewDelegate::AppListViewDelegate(AppListControllerDelegate* controller,
 }
 
 AppListViewDelegate::~AppListViewDelegate() {
-  if (signin_delegate_)
-    signin_delegate_->RemoveObserver(this);
   g_browser_process->
       profile_manager()->GetProfileInfoCache().RemoveObserver(this);
 }
@@ -91,8 +89,6 @@ void AppListViewDelegate::OnProfileChanged() {
 }
 
 void AppListViewDelegate::SetModel(app_list::AppListModel* model) {
-  if (signin_delegate_)
-    signin_delegate_->RemoveObserver(this);
   if (model) {
     model_ = model;
     apps_builder_.reset(new AppsModelBuilder(profile_,
@@ -104,7 +100,6 @@ void AppListViewDelegate::SetModel(app_list::AppListModel* model) {
         profile_, model->search_box(), model->results(), controller_.get()));
 
     signin_delegate_.reset(new ChromeSigninDelegate(profile_));
-    signin_delegate_->AddObserver(this);
 
 #if defined(USE_ASH)
     app_sync_ui_state_watcher_.reset(new AppSyncUIStateWatcher(profile_,
@@ -225,10 +220,6 @@ void AppListViewDelegate::OpenFeedback() {
                            chrome::kAppLauncherCategoryTag);
 }
 
-void AppListViewDelegate::OnSigninSuccess() {
-  OnProfileChanged();
-}
-
 void AppListViewDelegate::Observe(
     int type,
     const content::NotificationSource& source,