Simple strip container that can reveal/hide tab strip.

ios/chrome/browser/ui/strip/strip_container_view_controller.h

Index: ios/chrome/browser/ui/strip/strip_container_view_controller.h
diff --git a/ios/chrome/browser/ui/strip/strip_container_view_controller.h b/ios/chrome/browser/ui/strip/strip_container_view_controller.h
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+++ b/ios/chrome/browser/ui/strip/strip_container_view_controller.h
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+// 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_STRIP_STRIP_CONTAINER_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_STRIP_STRIP_CONTAINER_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+// Base class for a view controller that contains a content view (generally a
+// web view with toolbar, but nothing in this class assumes that) and a strip
+// view, each managed by their own view controllers.
+@interface StripContainerViewController : UIViewController
+
+// View controller showing the main content. If there is no strip view
+// controller set, the contents of this view controller will fill all of the
+// strip container's view.
+@property(nonatomic, strong) UIViewController* contentViewController;
+
+// View controller showing the strip. It will be of a fixed
+// height (determined internally by the strip container), but will span the
+// width of the tab.
+@property(nonatomic, strong) UIViewController* stripViewController;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_STRIP_STRIP_CONTAINER_VIEW_CONTROLLER_H_