Retain script path of parent isolate when spawnFunction is called so that

runtime/bin/vmservice_impl.cc

 // Copyright (c) 2013, 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 "bin/vmservice_impl.h"
 
 #include "include/dart_api.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 66 matching lines @@
     // Wait until service is running on spawned thread.
     ml.Wait();
   }
   return port_ != ILLEGAL_PORT;
 }
 
 
 bool VmService::_Start(intptr_t server_port) {
   ASSERT(isolate_ == NULL);
   char* error = NULL;
-  isolate_ = Dart_CreateIsolate("vmservice:", "main", snapshot_buffer,
-                                new IsolateData(),
+  const char* script_uri = "vmservice:";
+  IsolateData* isolate_data = new IsolateData(script_uri);
+  isolate_ = Dart_CreateIsolate(script_uri, "main", snapshot_buffer,
+                                isolate_data,
                                 &error);
   if (isolate_ == NULL) {
     error_msg_ = error;
     return false;
   }
 
   Dart_EnterScope();
 
   if (snapshot_buffer != NULL) {
     // Setup the native resolver as the snapshot does not carry it.
@@ skipping 420 matching lines @@
     if (!strcmp(function_name, entry.name) &&
         (num_arguments == entry.num_arguments)) {
       return entry.function;
     }
   }
   return NULL;
 }
 
 }  // namespace bin
 }  // namespace dart