[ios] Adds support for Find in Page to the new architecture.

ios/clean/chrome/browser/ui/tab/tab_container_view_controller.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_CLEAN_CHROME_BROWSER_UI_TAB_TAB_CONTAINER_VIEW_CONTROLLER_H_
 #define IOS_CLEAN_CHROME_BROWSER_UI_TAB_TAB_CONTAINER_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/clean/chrome/browser/ui/animators/zoom_transition_delegate.h"
@@ skipping 13 matching lines @@
 // View controller showing the toolbar for the tab. It will be of a fixed
 // height (determined internally by the tab container), but will span the
 // width of the tab.
 @property(nonatomic, strong) UIViewController* toolbarViewController;
 
 // View controller showing the tab strip. It will be of a fixed
 // height (determined internally by the tab container), but will span the
 // width of the tab.
 @property(nonatomic, strong) UIViewController* tabStripViewController;
 
+// View controller showing the find bar.  The location of this controller's view
+// is determined by size class and device type.  May be nil if the find bar is
+// currently closed.
+@property(nonatomic, strong) UIViewController* findBarViewController;
+
 @end
 
 // Tab container which positions the toolbar at the top.
 @interface TopToolbarTabViewController : TabContainerViewController
 @end
 
 // Tab container which positions the toolbar at the bottom.
 @interface BottomToolbarTabViewController : TabContainerViewController
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_UI_TAB_TAB_CONTAINER_VIEW_CONTROLLER_H_