[ios] Creates ToolsMenuModel Class

ios/chrome/browser/ui/tools_menu/BUILD.gn

 # 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.
 
 source_set("tools_menu") {
   sources = [
     "reading_list_menu_view_item.h",
     "reading_list_menu_view_item.mm",
     "tools_menu_context.h",
     "tools_menu_context.mm",
+    "tools_menu_model.h",
+    "tools_menu_model.mm",
     "tools_menu_view_controller.h",
     "tools_menu_view_controller.mm",
     "tools_menu_view_item.h",
     "tools_menu_view_item.mm",
     "tools_menu_view_tools_cell.h",
     "tools_menu_view_tools_cell.mm",
     "tools_popup_controller.h",
     "tools_popup_controller.mm",
   ]
   deps = [
@@ skipping 49 matching lines @@
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui:ui_internal",
     "//ios/chrome/browser/ui/toolbar",
     "//ios/chrome/test/earl_grey:test_support",
     "//ios/third_party/earl_grey",
     "//ios/web:test_support",
     "//ui/base",
   ]
   libs = [ "XCTest.framework" ]
 }