Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/settings/sync_settings_collection_view_controller.h

+// Copyright 2015 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_SETTINGS_SYNC_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_SYNC_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
+
+#import "ios/chrome/browser/ui/settings/settings_root_collection_view_controller.h"
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+// The a11y identifier of the view controller's view.
+extern NSString* const kSettingsSyncId;
+// Notification when a switch account operation will start.
+extern NSString* const kSwitchAccountWillStartNotification;
+// Notification when a switch account operation did finish.
+extern NSString* const kSwitchAccountDidFinishNotification;
+
+@interface SyncSettingsCollectionViewController
+    : SettingsRootCollectionViewController
+
+// |browserState| must not be nil.
+// |allowSwitchSyncAccount| indicates whether switching sync account is allowed
+// on the screen.
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
+              allowSwitchSyncAccount:(BOOL)allowSwitchSyncAccount
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
+@end
+
+@interface SyncSettingsCollectionViewController (UsedForTesting)
+// Returns YES if a sync error cell should be displayed.
+- (BOOL)shouldDisplaySyncError;
+// Return YES if the Sync settings should be disabled because of a Sync error.
+- (BOOL)shouldDisableSettingsOnSyncError;
+// Returns YES if the encryption cell should display an error.
+- (BOOL)shouldDisplayEncryptionError;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_SYNC_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_