[turbofan] delete graph and schedule before register allocation.

src/compiler/common-operator.h

Index: src/compiler/common-operator.h
diff --git a/src/compiler/common-operator.h b/src/compiler/common-operator.h
index 9b077c314f7703439974703648f982176cac25f5..31c3d129e2257a8b553a6955e1a09333b1d99246 100644
--- a/src/compiler/common-operator.h
+++ b/src/compiler/common-operator.h
@@ -131,7 +131,7 @@ std::ostream& operator<<(std::ostream&, FrameStateCallInfo const&);
 
 // Interface for building common operators that can be used at any level of IR,
 // including JavaScript, mid-level, and low-level.
-class CommonOperatorBuilder FINAL {
+class CommonOperatorBuilder FINAL : public ZoneObject {
  public:
   explicit CommonOperatorBuilder(Zone* zone);
 
@@ -174,6 +174,8 @@ class CommonOperatorBuilder FINAL {
 
   const CommonOperatorBuilderImpl& impl_;
   Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder);
 };
 
 }  // namespace compiler