Put back sign in / sign out / new user handling in the App Launcher.

chrome/browser/ui/app_list/test/chrome_app_list_test_support.h

Index: chrome/browser/ui/app_list/test/chrome_app_list_test_support.h
diff --git a/chrome/browser/ui/app_list/test/chrome_app_list_test_support.h b/chrome/browser/ui/app_list/test/chrome_app_list_test_support.h
index f8b4988b0876c5ba0a2aff0512f5c1e8a98ab6f2..fe79605d4df8f0ef2ca309a741f947178106ad95 100644
--- a/chrome/browser/ui/app_list/test/chrome_app_list_test_support.h
+++ b/chrome/browser/ui/app_list/test/chrome_app_list_test_support.h
@@ -10,7 +10,6 @@ class AppListModel;
 }
 
 class AppListService;
-class Profile;
 
 namespace test {
 
@@ -20,9 +19,6 @@ app_list::AppListModel* GetAppListModel(AppListService* service);
 // Gets the app list service for the desktop type currently being tested.
 AppListService* GetAppListService();
 
-// Simulate a Chrome sign-in for the given |profile|.
-void SigninProfile(Profile* profile);
-
 }  // namespace test
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_TEST_CHROME_APP_LIST_TEST_SUPPORT_H_