Remove need to sign in to use the App Launcher.

ui/app_list/cocoa/signin_view_controller.h

-// Copyright 2013 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.
-
-#ifndef UI_APP_LIST_COCOA_SIGNIN_VIEW_CONTROLLER_H_
-#define UI_APP_LIST_COCOA_SIGNIN_VIEW_CONTROLLER_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-class SigninDelegate;
-}
-
-// Controller for the app list signin page. The signin view shows a blue button
-// that opens a browser window to conduct the signin flow. The delegate also
-// provides UI text and actions for the view, including "Learn More" and
-// "Settings" links.
-APP_LIST_EXPORT
-@interface SigninViewController : NSViewController {
- @private
-  app_list::SigninDelegate* delegate_; // Weak. Owned by AppListViewDelegate.
-}
-
-- (id)initWithFrame:(NSRect)frame
-       cornerRadius:(CGFloat)cornerRadius
-           delegate:(app_list::SigninDelegate*)delegate;
-
-@end
-
-#endif  // UI_APP_LIST_COCOA_SIGNIN_VIEW_CONTROLLER_H_