VM: Fix snapshoting slow-down caused by 99c6a18a1bc2a4f13d8dd027a597fdca0f2d6e0c.

runtime/bin/loader.cc

Index: runtime/bin/loader.cc
diff --git a/runtime/bin/loader.cc b/runtime/bin/loader.cc
index cdf370b2a11f4c0b7187dc955fe41a73a197d7ee..92da2ed1743262e60557a05a4b104ead1a4307fb 100644
--- a/runtime/bin/loader.cc
+++ b/runtime/bin/loader.cc
@@ -140,7 +140,7 @@ void Loader::Init(const char* package_root,
   // Keep in sync with loader.dart.
   const intptr_t _Dart_kInitLoader = 4;
 
-  Dart_Handle request = Dart_NewList(8);
+  Dart_Handle request = Dart_NewList(9);
   Dart_ListSetAt(request, 0, trace_loader ? Dart_True() : Dart_False());
   Dart_ListSetAt(request, 1, Dart_NewInteger(Dart_GetMainPortId()));
   Dart_ListSetAt(request, 2, Dart_NewInteger(_Dart_kInitLoader));
@@ -155,6 +155,8 @@ void Loader::Init(const char* package_root,
   Dart_ListSetAt(request, 7, (root_script_uri == NULL)
                                  ? Dart_Null()
                                  : Dart_NewStringFromCString(root_script_uri));
+  Dart_ListSetAt(request, 8, Dart_NewBoolean(Dart_IsReloading()));
+
 
   bool success = Dart_Post(loader_port, request);
   ASSERT(success);