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

ios/chrome/app/application_delegate/user_activity_handler.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_APP_APPLICATION_DELEGATE_USER_ACTIVITY_HANDLER_H_
+#define IOS_CHROME_APP_APPLICATION_DELEGATE_USER_ACTIVITY_HANDLER_H_
+
+#import <UIKit/UIKit.h>
+
+@protocol BrowserViewInformation;
+@protocol StartupInformation;
+@protocol TabOpening;
+
+// TODO(crbug.com/619598): When the refactoring is over, check if it can be
+// merged with StartupInformation.
+// Handles all events based on user activity, as defined in
+// UIApplicationDelegate.
+@interface UserActivityHandler : NSObject
+
+// If the userActivity is a Handoff or an opening from Spotlight, opens a new
+// tab or setup startupParameters to open it later.
+// Returns wether it could continue userActivity.
++ (BOOL)continueUserActivity:(NSUserActivity*)userActivity
+         applicationIsActive:(BOOL)applicationIsActive
+                   tabOpener:(id<TabOpening>)tabOpener
+          startupInformation:(id<StartupInformation>)startupInformation;
+
+// Handles the 3D touch application static items. If the First Run UI is active,
+// |completionHandler| will be called with NO.
++ (void)performActionForShortcutItem:(UIApplicationShortcutItem*)shortcutItem
+                   completionHandler:(void (^)(BOOL succeeded))completionHandler
+                           tabOpener:(id<TabOpening>)tabOpener
+                  startupInformation:(id<StartupInformation>)startupInformation
+              browserViewInformation:
+                  (id<BrowserViewInformation>)browserViewInformation;
+
+// Returns YES if Chrome is passing a Handoff to itself or if it is an opening
+// from Spotlight.
++ (BOOL)willContinueUserActivityWithType:(NSString*)userActivityType;
+
+// Opens a new Tab or routes to correct Tab.
++ (void)handleStartupParametersWithTabOpener:(id<TabOpening>)tabOpener
+                          startupInformation:
+                              (id<StartupInformation>)startupInformation
+                      browserViewInformation:
+                          (id<BrowserViewInformation>)browserViewInformation;
+
+@end
+
+#endif  // IOS_CHROME_APP_APPLICATION_DELEGATE_USER_ACTIVITY_HANDLER_H_