Prevent liveedit on or under generators with open activations

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 3be682c276ded17a3c96e9fb6aa4cb5235573f64..6114875df4b78aafe1b168410e951109ed1d6acd 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5846,6 +5846,14 @@ bool JSGeneratorObject::is_suspended() {
   return continuation() > 0;
 }
 
+bool JSGeneratorObject::is_closed() {
+  return continuation() == kGeneratorClosed;
+}
+
+bool JSGeneratorObject::is_executing() {
+  return continuation() == kGeneratorExecuting;
+}
+
 JSGeneratorObject* JSGeneratorObject::cast(Object* obj) {
   ASSERT(obj->IsJSGeneratorObject());
   ASSERT(HeapObject::cast(obj)->Size() == JSGeneratorObject::kSize);