Lazy loading of deferred libraries

runtime/vm/benchmark_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/benchmark_test.h"
 
 #include "bin/builtin.h"
 #include "bin/file.h"
 
 #include "platform/assert.h"
@@ skipping 415 matching lines @@
   const char* kScriptChars =
       "import 'dart:async';\n"
       "import 'dart:core';\n"
       "import 'dart:collection';\n"
       "import 'dart:_internal';\n"
       "import 'dart:convert';\n"
       "import 'dart:math';\n"
       "import 'dart:isolate';\n"
       "import 'dart:mirrors';\n"
       "import 'dart:typed_data';\n"
-      "import 'dart:builtin';\n"
+      "import 'dart:_builtin';\n"
       "import 'dart:io';\n"
       "\n";
 
   // Start an Isolate, load a script and create a full snapshot.
   uint8_t* buffer;
   // Need to load the script into the dart: core library due to
   // the import of dart:_internal.
   TestCase::LoadCoreTestScript(kScriptChars, NULL);
   Api::CheckIsolateState(Isolate::Current());
 
@@ skipping 114 matching lines @@
     SnapshotReader reader(buffer, buffer_len, Snapshot::kMessage, isolate);
     reader.ReadObject();
     free(buffer);
   }
   timer.Stop();
   int64_t elapsed_time = timer.TotalElapsedTime();
   benchmark->set_score(elapsed_time);
 }
 
 }  // namespace dart