[turbofan] delete graph and schedule before register allocation.

src/compiler/typer.h

Index: src/compiler/typer.h
diff --git a/src/compiler/typer.h b/src/compiler/typer.h
index 5ca4d7cdcb6243e1c225bfa51b74276c66d7d835..eb232bcf8c77bca03ce68d4c09798363f8d3e9c1 100644
--- a/src/compiler/typer.h
+++ b/src/compiler/typer.h
@@ -15,7 +15,7 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-class Typer {
+class Typer : public ZoneObject {
  public:
   explicit Typer(Graph* graph, MaybeHandle<Context> context);
   ~Typer();
@@ -67,6 +67,8 @@ class Typer {
   Type* uint32_array_fun_;
   Type* float32_array_fun_;
   Type* float64_array_fun_;
+
+  DISALLOW_COPY_AND_ASSIGN(Typer);
 };
 }
 }