[ios clean] Add placeholder for NTP bookmarks, chrome home and open tabs.

ios/clean/chrome/browser/ui/ntp/BUILD.gn

 # Copyright 2017 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("ntp") {
   sources = [
     "new_tab_page_coordinator.h",
     "new_tab_page_coordinator.mm",
+    "new_tab_page_home_coordinator.h",
+    "new_tab_page_home_coordinator.mm",
+    "new_tab_page_incognito_coordinator.h",
+    "new_tab_page_incognito_coordinator.mm",
+    "new_tab_page_mediator.h",
+    "new_tab_page_mediator.mm",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 
   deps = [
     ":ntp_ui",
+    "//ios/chrome/app/strings:ios_strings_grit",
+    "//ios/chrome/browser/ui:ui",
+    "//ios/chrome/browser/ui/ntp:ntp_internal",
+    "//ios/chrome/browser/ui/toolbar:toolbar",
+    "//ios/clean/chrome/browser/ui/bookmarks/",
+    "//ios/clean/chrome/browser/ui/commands:commands",
+    "//ios/clean/chrome/browser/ui/open_tabs/",
     "//ios/shared/chrome/browser/coordinator_context",
+    "//ios/shared/chrome/browser/ui/browser_list:browser_list",
     "//ios/shared/chrome/browser/ui/coordinators",
+    "//ios/web:web_arc",
+    "//ui/base:base",
+    "//url:url",
   ]
 }
 
 source_set("ntp_ui") {
   sources = [
+    "new_tab_page_consumer.h",
     "new_tab_page_view_controller.h",
     "new_tab_page_view_controller.mm",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 
   deps = [
     "//base",
     "//components/strings:components_strings_grit",
     "//ios/chrome/app/strings:ios_strings_grit",
+    "//ios/chrome/browser/ui:ui",
     "//ios/chrome/browser/ui/ntp:ntp_internal",
     "//ios/clean/chrome/browser/ui",
+    "//ios/clean/chrome/browser/ui/commands:commands",
     "//ui/base:base",
   ]
 }