[CRD iOS] Branching internal and external implementations

remoting/ios/app/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.
 
 import("//remoting/ios/app/remoting_ios_tmpl.gni")
 
 group("all") {
   testonly = true
 
   deps = [
     ":ios_remoting_app",
   ]
 }
 
 # source set to be used by both external and internal app.
 source_set("common_source_set") {
   sources = [
     "app_delegate.h",
     "app_delegate.mm",
+    "app_view_controller.h",
     "client_connection_view_controller.h",
     "client_connection_view_controller.mm",
     "host_collection_header_view.h",
     "host_collection_header_view.mm",
     "host_collection_view_cell.h",
     "host_collection_view_cell.mm",
     "host_collection_view_controller.h",
     "host_collection_view_controller.mm",
     "host_view_controller.h",
     "host_view_controller.mm",
+    "main.mm",
     "pin_entry_view.h",
     "pin_entry_view.mm",
-    "remoting_menu_view_controller.h",
-    "remoting_menu_view_controller.mm",
     "remoting_theme.h",
     "remoting_theme.mm",
     "remoting_view_controller.h",
     "remoting_view_controller.mm",
   ]
 
   deps = [
     "//base",
     "//google_apis",
     "//remoting/base",
@@ skipping 10 matching lines @@
 
   public_deps = [
     "//ios/third_party/material_components_ios",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
 }
 
 source_set("main") {
   sources = [
-    "main.mm",
+    "app_view_controller_chromium.mm",
+    "remoting_menu_view_controller.h",
+    "remoting_menu_view_controller.mm",
   ]
   deps = [
     ":common_source_set",
     "//remoting/ios/app/resources:system_icons",
   ]
   configs += [ "//build/config/compiler:enable_arc" ]
 }
 
 ios_remoting_app_tmpl("ios_remoting_app") {
   output_name = "chromoting"
   entitlements_path = "resources/Remoting.entitlements"
   remoting_source_set = ":main"
 }