Make it possible to run Sky apps offline

sky/shell/BUILD.gn

 # Copyright 2015 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.
 
 common_deps = [
   "//base",
   "//base:i18n",
   "//build/config/sanitizers:deps",
   "//dart/runtime:libdart",
   "//mojo/common",
   "//mojo/edk/system",
   "//mojo/public/cpp/application",
   "//mojo/public/interfaces/application",
   "//mojo/services/asset_bundle/public/interfaces",
   "//mojo/services/navigation/public/interfaces",
   "//mojo/services/network/public/interfaces",
   "//services/asset_bundle:lib",
   "//skia",
   "//sky/engine",
   "//sky/engine/tonic",
   "//sky/engine/wtf",
   "//sky/services/platform",
   "//sky/services/viewport",
+  "//sky/shell/dart",
   "//ui/gfx/geometry",
   "//ui/gl",
 ]
 
 source_set("common") {
   sources = [
     "gpu/ganesh_context.cc",
     "gpu/ganesh_context.h",
     "gpu/ganesh_surface.cc",
     "gpu/ganesh_surface.h",
@@ skipping 144 matching lines @@
       "linux/main.cc",
       "linux/platform_service_provider_linux.cc",
       "linux/platform_view_linux.cc",
     ]
 
     deps = common_deps + [ ":common" ]
   }
 } else {
   assert(false, "Unsupported platform")
 }