[turbofan] delete graph and schedule before register allocation.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 568d3eb2b89acc163584aea605375772ccfed1f0..a61cfb8459943e55683741b6e5f2aad930e18327 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -55,7 +55,7 @@ StoreRepresentation const& StoreRepresentationOf(Operator const*);
 // Interface for building machine-level operators. These operators are
 // machine-level but machine-independent and thus define a language suitable
 // for generating code to run on architectures such as ia32, x64, arm, etc.
-class MachineOperatorBuilder FINAL {
+class MachineOperatorBuilder FINAL : public ZoneObject {
  public:
   explicit MachineOperatorBuilder(MachineType word = kMachPtr);
 
@@ -181,6 +181,8 @@ class MachineOperatorBuilder FINAL {
  private:
   const MachineOperatorBuilderImpl& impl_;
   const MachineType word_;
+
+  DISALLOW_COPY_AND_ASSIGN(MachineOperatorBuilder);
 };
 
 }  // namespace compiler