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

ios/clean/chrome/browser/ui/actions/tools_menu_actions.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_CLEAN_CHROME_BROWSER_UI_ACTIONS_TOOLS_MENU_ACTIONS_H_
 #define IOS_CLEAN_CHROME_BROWSER_UI_ACTIONS_TOOLS_MENU_ACTIONS_H_
 
 #import <Foundation/Foundation.h>
 
 // Target/Action methods relating to the Tools menu  UI.
 // (Actions should only be used to communicate into or between the View
 // Controller layer).
 @protocol ToolsMenuActions
 
 @optional
 
 // Closes the Tools menu. Most menu items should send this message
 // in addition to other messages they send.
 - (void)closeToolsMenu:(id)sender;
 
+// Starts find in page and shows the find bar.
+- (void)showFindInPage;
+
+// Displays the Share menu.
+- (void)showShareMenu:(id)sender;
+
 // Displays the Tools menu.
 - (void)showToolsMenu:(id)sender;
 
-// Displays the Share menu.
-- (void)showShareMenu:(id)sender;
-
 @end
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_UI_ACTIONS_TOOLS_MENU_ACTIONS_H_