Move bootstrap scripts and token streams to the VM isolate so that they become read only objects. T…

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 217f30f4bf54851e7e75a45ce60e0de3add2c71d..6e2f5bd2eaeec416ef0caebd879360dde6a72247 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -389,6 +389,9 @@ class RawObject {
   bool IsFreeListElement() {
     return ((GetClassId() == kFreeListElement));
   }
+  bool IsScript() {
+    return ((GetClassId() == kScriptCid));
+  }
 
   intptr_t Size() const {
     uword tags = ptr()->tags_;