Upstream Chrome on iOS source code [1/11].

ios/chrome/app/spotlight/spotlight_manager.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_APP_SPOTLIGHT_SPOTLIGHT_MANAGER_H_
+#define IOS_CHROME_APP_SPOTLIGHT_SPOTLIGHT_MANAGER_H_
+
+#import <Foundation/Foundation.h>
+
+namespace ios {
+class ChromeBrowserState;
+}
+
+// Allows Chrome to add the bookmarks of |bookmarkModel| in the systemwide
+// Spotlight search index.
+// Bookmarks are added, removed or updated in Spotlight based on
+// BookmarkModelObserver notification.
+// As there is no possibility to check the state of the index, a global
+// reindexing is triggered on cold start every 7 days to enforce
+// bookmarks/spotlight synchronization. A global reindexing will clear the index
+// and reindex the first 1000 bookmarks.
+@interface SpotlightManager : NSObject
+
+// Creates a SpotlightManager tracking and indexing various browser state
+// elements such as most actives and bookmarks.
+// |browserState| must not be nil.
+// There should be only one SpotlightManager observing |browserState|.
++ (SpotlightManager*)spotlightManagerWithBrowserState:
+    (ios::ChromeBrowserState*)browserState;
+
+// Resyncs the index if necessary
+- (void)resyncIndex;
+
+@end
+
+#endif  // IOS_CHROME_APP_SPOTLIGHT_SPOTLIGHT_MANAGER_H_