Changes to prepare for allowing script snapshots to be taken after running the main application

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index fef9c4c3443c63432b1361e031516fd91b3acf86..780a3fd5d7433ad63f5dba6418c21ff67c76b765 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4346,6 +4346,10 @@ class Code : public Object {
     DISALLOW_COPY_AND_ASSIGN(FindRawCodeVisitor);
   };
 
+  static bool IsOptimized(RawCode* code) {
+    return Code::OptimizedBit::decode(code->ptr()->state_bits_);
+  }
+
   static const intptr_t kEntrySize = sizeof(int32_t);  // NOLINT
 
   void set_compile_timestamp(int64_t timestamp) const {