Refactor snapshots pieces to include a section for loading instructions into the heap of a regular …

runtime/lib/isolate.cc

Index: runtime/lib/isolate.cc
diff --git a/runtime/lib/isolate.cc b/runtime/lib/isolate.cc
index 337fec151f855859e5fd4a2197e43a868a337abf..7e4ce042d807660dfff8dc515453dd960c2d5cdd 100644
--- a/runtime/lib/isolate.cc
+++ b/runtime/lib/isolate.cc
@@ -340,11 +340,12 @@ DEFINE_NATIVE_ENTRY(Isolate_spawnUri, 12) {
   GET_NATIVE_ARGUMENT(String, packageRoot, arguments->NativeArgAt(10));
   GET_NATIVE_ARGUMENT(String, packageConfig, arguments->NativeArgAt(11));
 
-  if (Dart::snapshot_kind() == Snapshot::kAppAOT) {
+  if (Dart::vm_snapshot_kind() == Snapshot::kAppAOT) {
     const Array& args = Array::Handle(Array::New(1));
     args.SetAt(
-        0, String::Handle(String::New(
-               "Isolate.spawnUri not supported when using AOT compilation")));
+        0,
+        String::Handle(String::New(
+            "Isolate.spawnUri is not supported when using AOT compilation")));
     Exceptions::ThrowByType(Exceptions::kUnsupported, args);
     UNREACHABLE();
   }