[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 c59ca49f5c9d67368b38b7df16bc9d0b70564d53..3c181900ff24a40be10be67a92ecd435c6f4c5bd 100644
--- a/src/compiler/common-operator.h
+++ b/src/compiler/common-operator.h
@@ -127,7 +127,7 @@ 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);
 
@@ -170,6 +170,8 @@ class CommonOperatorBuilder FINAL {
 
   const CommonOperatorBuilderImpl& impl_;
   Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder);
 };
 
 }  // namespace compiler