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

ios/chrome/browser/ui/settings/utils/content_setting_backed_boolean.h

+// Copyright 2016 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_UTILS_CONTENT_SETTING_BACKED_BOOLEAN_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_UTILS_CONTENT_SETTING_BACKED_BOOLEAN_H_
+
+#import <Foundation/Foundation.h>
+
+#include "components/content_settings/core/common/content_settings_types.h"
+#import "ios/chrome/browser/ui/settings/utils/observable_boolean.h"
+
+class HostContentSettingsMap;
+
+// An observable boolean backed by a setting from a HostContentSettingsMap.
+@interface ContentSettingBackedBoolean : NSObject<ObservableBoolean>
+
+// Returns a ContentSettingBackedBoolean backed by |settingID| from
+// |settingsMap|. |inverted| specifies that the ON state of the boolean value
+// corresponds to the OFF state of the content setting. For example, a boolean
+// value for "disable popups" that corresponds to a model object that allows
+// popups.
+- (instancetype)initWithHostContentSettingsMap:
+                    (HostContentSettingsMap*)settingsMap
+                                     settingID:(ContentSettingsType)settingID
+                                      inverted:(BOOL)inverted
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_UTILS_CONTENT_SETTING_BACKED_BOOLEAN_H_