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

mojo/dart/embedder/builtin.cc

 // 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.
 
 #include <stdio.h>
 
 #include "base/i18n/icu_util.h"
-#include "dart/runtime/include/dart_api.h"
 #include "mojo/dart/embedder/builtin.h"
 #include "mojo/dart/embedder/mojo_io_natives.h"
 #include "mojo/dart/embedder/mojo_natives.h"
+#include "mojo/public/third_party/dart/runtime/include/dart_api.h"
 
 namespace mojo {
 namespace dart {
 
 struct ResourcesEntry {
   const char* path_;
   const char* resource_;
   int length_;
 };
 
@@ skipping 127 matching lines @@
     DCHECK(builtin_libraries_[id].patch_resources_ != nullptr);
     LoadPatchFiles(library,
                    builtin_libraries_[id].patch_url_,
                    builtin_libraries_[id].patch_resources_);
   }
   return library;
 }
 
 }  // namespace dart
 }  // namespace mojo