Make FrameStates recursive (to be used for inlining).

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 04e0fee704e9c7904c2aefc3f44732a67cd32e27..9cb394e8b387024b4f6e057bc4a7e95b0b204271 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -64,6 +64,12 @@ class RawMachineAssembler : public GraphBuilder,
     return call_descriptor_builder_->parameter_types();
   }
 
+  Node* UndefinedConstant() {
+    PrintableUnique<Object> unique = PrintableUnique<Object>::CreateImmovable(
+        zone(), isolate()->factory()->undefined_value());
+    return NewNode(common()->HeapConstant(unique));
+  }
+
   // Parameters.
   Node* Parameter(int index);