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

ios/clean/chrome/browser/ui/tools/menu_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_TOOLS_MENU_VIEW_CONTROLLER_H_
 #define IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_MENU_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/clean/chrome/browser/ui/tools/tools_consumer.h"
 
+@protocol FindInPageVisibilityCommands;
 @protocol ToolsMenuCommands;
 
 // View controller that displays a vertical list of buttons to act as a menu.
 // The view controller dismisses as soon as any of the buttons, or any area
 // outside the presentation area, is tapped.
 @interface MenuViewController : UIViewController<ToolsConsumer>
+
 // The dispatcher for this view controller.
-@property(nonatomic, weak) id<ToolsMenuCommands> dispatcher;
+@property(nonatomic, weak) id<FindInPageVisibilityCommands, ToolsMenuCommands>
+    dispatcher;
+
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_MENU_VIEW_CONTROLLER_H_