[turbofan] delete graph and schedule before register allocation.

src/compiler/js-operator.h

Index: src/compiler/js-operator.h
diff --git a/src/compiler/js-operator.h b/src/compiler/js-operator.h
index b659292d6680f7e2cd9a3c3a1cc4d8b17c41ddce..e2dfab4a14b6c75d67f27268933ddabb5d9e4cd1 100644
--- a/src/compiler/js-operator.h
+++ b/src/compiler/js-operator.h
@@ -193,7 +193,7 @@ const StoreNamedParameters& StoreNamedParametersOf(const Operator* op);
 // Interface for building JavaScript-level operators, e.g. directly from the
 // AST. Most operators have no parameters, thus can be globally shared for all
 // graphs.
-class JSOperatorBuilder FINAL {
+class JSOperatorBuilder FINAL : public ZoneObject {
  public:
   explicit JSOperatorBuilder(Zone* zone);
 
@@ -264,6 +264,8 @@ class JSOperatorBuilder FINAL {
 
   const JSOperatorBuilderImpl& impl_;
   Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(JSOperatorBuilder);
 };
 
 }  // namespace compiler