Upstream Chrome on iOS source code [7/11].

ios/chrome/browser/ui/settings/dataplan_usage_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_DATAPLAN_USAGE_COLLECTION_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_DATAPLAN_USAGE_COLLECTION_VIEW_CONTROLLER_H_
+
+#import "ios/chrome/browser/ui/settings/settings_root_collection_view_controller.h"
+
+class PrefService;
+
+// Class that handles the UI and preference setting for options that require
+// three states:  'Always', 'Only on WiFi', and 'Never'.
+@interface DataplanUsageCollectionViewController
+    : SettingsRootCollectionViewController
+
+- (instancetype)initWithPrefs:(PrefService*)prefs
+                     basePref:(const char*)basePreference
+                     wifiPref:(const char*)wifiPreference
+                        title:(NSString*)title NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
+    NS_UNAVAILABLE;
+
+// Returns the text for the current setting, based on the values of the
+// preferences.  Kept in this class, so that all of the code to translate from
+// preferences to UI is in one place.
++ (NSString*)currentLabelForPreference:(PrefService*)prefs
+                              basePref:(const char*)basePreference
+                              wifiPref:(const char*)wifiPreference;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_DATAPLAN_USAGE_COLLECTION_VIEW_CONTROLLER_H_