Roll Dart forward and use the shared vmservice isolate sources + benchmark fixes

mojo/dart/embedder/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.
 
 # embedder specific template rules.
 import("embedder.gni")
 import("//mojo/dart/packages/mojo/sources.gni")
 import("//mojo/dart/packages/mojo/sdk_ext_sources.gni")
 
 group("embedder") {
@@ skipping 119 matching lines @@
   ]
   script = rebase_path(
           "//mojo/dart/embedder/tools/dart_rewrite_embedder_package_imports.py")
   args = [
     rebase_path("{{source}}", "", root_build_dir),
     rebase_path(
         "$root_gen_dir/dart_embedder_packages/{{source_root_relative_dir}}/{{source_file_part}}"),
   ]
 }
 
+vmservice_sources_gypi =
+    exec_script(
+        "//build/gypi_to_gn.py",
+        [ rebase_path("//dart/runtime/bin/vmservice/vmservice_sources.gypi") ],
+        "scope",
+        [ rebase_path("//dart/runtime/bin/vmservice/vmservice_sources.gypi") ])
+
 dart_embedder_resources("generate_dart_embedder_service_isolate_resources_cc") {
-  inputs = [
-    "//mojo/dart/embedder/vmservice/loader.dart",
-    "//mojo/dart/embedder/vmservice/main.dart",
-    "//mojo/dart/embedder/vmservice/server.dart",
-  ]
-  root_prefix = "//mojo/dart/embedder/"
+  inputs = rebase_path(vmservice_sources_gypi.sources,
+                       "",
+                       "//dart/runtime/bin/vmservice/")
+  root_prefix = "//dart/runtime/bin/"
   output = "$target_gen_dir/dart_embedder_service_isolate_resources.cc"
   table_name = "dart_embedder_service_isolate"
 }
 
 action("generate_snapshot_bin") {
   deps = [
     ":dart_embedder_packages",
     "//dart/runtime/bin:gen_snapshot($host_toolchain)",
   ]
   inputs = [
@@ skipping 108 matching lines @@
 
 source_set("dart_snapshot_cc") {
   sources = [
     "$root_gen_dir/dart_snapshot.cc",
   ]
 
   deps = [
     ":generate_snapshot_file",
   ]
 }