Stop running pub get at gclient sync time and fix build bugs

services/dart/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("//mojo/public/mojo_application.gni")
 
 group("dart") {
   deps = [
     ":dart_content_handler",
   ]
@@ skipping 17 matching lines @@
     "content_handler_main.cc",
     "dart_app.cc",
     "dart_app.h",
   ]
 
   deps = [
     ":dart_controller",
     "//base",
     "//base:i18n",
     "//crypto",
-    "//dart/runtime:libdart",
     "//mojo/application",
     "//mojo/application:application",
     "//mojo/application:content_handler",
     "//mojo/dart/embedder:dart_controller_no_snapshot",
     "//mojo/data_pipe_utils",
     "//mojo/common:tracing_impl",
     "//mojo/environment:chromium",
     "//mojo/public/cpp/system",
     "//mojo/public/cpp/utility",
     "//mojo/public/interfaces/application",
+    "//mojo/public/third_party/dart/runtime:libdart",
     "//mojo/services/content_handler/public/interfaces",
     "//mojo/services/network/public/interfaces",
     "//mojo/services/url_response_disk_cache/public/interfaces",
     "//third_party/zlib:zip",
     "//url:url",
   ]
 }