Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/promos/signin_promo_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 IOS_CHROME_BROWSER_UI_PROMOS_SIGNIN_PROMO_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_PROMOS_SIGNIN_PROMO_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/authentication/chrome_signin_view_controller.h"
+#import "ios/chrome/browser/ui/promos/promo_view_controller.h"
+
+@class SigninPromoViewController;
+
+namespace ios {
+class ChromeBrowserState;
+}
+
+// Key in the UserDefaults to record the version of the application when the
+// SSO Recall promo has been displayed.
+// Exposed for testing.
+extern NSString* kDisplayedSSORecallForMajorVersionKey;
+
+// Class to display a promotion view to encourage the user to sign on, if
+// SSO detects that the user has signed in with another application.
+//
+// Note: On iPhone, this controller supports portrait orientation only. It
+// should always be presented in an |OrientationLimitingNavigationController|.
+@interface SigninPromoViewController
+    : ChromeSigninViewController<PromoViewController>
+
+// Designated initializer.  |browserState| must not be nil.
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState;
+
+// Records in user defaults that the promo has been shown along with the current
+// version number.
++ (void)recordVersionSeen;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_PROMOS_SIGNIN_PROMO_VIEW_CONTROLLER_H_