Move chrome.fileSystem implementation to //extensions

apps/BUILD.gn

 # Copyright 2014 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//extensions/features/features.gni")
 
 assert(!is_android && !is_ios)
 
@@ skipping 10 matching lines @@
       "app_restore_service.h",
       "app_restore_service_factory.cc",
       "app_restore_service_factory.h",
       "browser_context_keyed_service_factories.cc",
       "browser_context_keyed_service_factories.h",
       "launcher.cc",
       "launcher.h",
       "metrics_names.h",
       "saved_files_service.cc",
       "saved_files_service.h",
+      "saved_files_service_delegate_impl.cc",
+      "saved_files_service_delegate_impl.h",
       "saved_files_service_factory.cc",
       "saved_files_service_factory.h",
       "switches.cc",
       "switches.h",
     ]
 
     configs += [ "//build/config/compiler:wexit_time_destructors" ]
 
     deps = [
       "//components/keyed_service/content",
@@ skipping 17 matching lines @@
   testonly = true
   sources = [
     "test/app_window_waiter.cc",
     "test/app_window_waiter.h",
   ]
 
   public_deps = [
     "//content/public/browser",
   ]
 }