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

ios/chrome/browser/ui/tab/tab_coordinator.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.
+
+// ======                        New Architecture                         =====
+// =         This code is only used in the new iOS Chrome architecture.       =
+// ============================================================================
+
+#ifndef IOS_CHROME_BROWSER_UI_TAB_TAB_COORDINATOR_H_
+#define IOS_CHROME_BROWSER_UI_TAB_TAB_COORDINATOR_H_
+
+#import <UIKit/UIKit.h>
+#import "ios/chrome/browser/browser_coordinator.h"
+
+namespace web {
+class WebState;
+}
+
+// Coordinator that runs a tab: A composed UI consisting of a web view plus
+// additional UI components such as a toolbar.
+@interface TabCoordinator : BrowserCoordinator
+
+// The webState representing the web page that will be displayed in this tab.
+// Calling code should assign this before starting this coordinator.
+// This coordinator doesn't assume ownersip of |webState|.
+@property(nonatomic, assign) web::WebState* webState;
+
+// An opaque key provided by this coordinator's parent which can be passed in
+// to a transition animation to synchronize the presentation with the presenting
+// view controller, if any.
+@property(nonatomic, copy) NSObject* presentationKey;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TAB_TAB_COORDINATOR_H_