Toward precompiled snapshots.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 04a8a0d6d8aa70d903f189a4352222e608170b99..002d35241479b57aa02e3bfa61615e4ae9f5cf19 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -488,6 +488,12 @@ class Object {
     return *vm_isolate_snapshot_object_table_;
   }
   static void InitVmIsolateSnapshotObjectTable(intptr_t len);
+  static const uint8_t* instructions_snapshot_buffer() {
+    return instructions_snapshot_buffer_;
+  }
+  static void set_instructions_snapshot_buffer(const uint8_t* buffer) {
+    instructions_snapshot_buffer_ = buffer;
+  }
 
   static RawClass* class_class() { return class_class_; }
   static RawClass* dynamic_class() { return dynamic_class_; }
@@ -813,6 +819,7 @@ class Object {
   static LanguageError* snapshot_writer_error_;
   static LanguageError* branch_offset_error_;
   static Array* vm_isolate_snapshot_object_table_;
+  static const uint8_t* instructions_snapshot_buffer_;
 
   friend void ClassTable::Register(const Class& cls);
   friend void RawObject::Validate(Isolate* isolate) const;