Reorganize object type enum, such that proxies are no longer in the middle

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 8cb4cece960a0c896da6ebc3106bc38eda5f7691..f698b0ebf0c061faee1fa5a0392ad7e81453cb1c 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -140,7 +140,8 @@ class LCodeGen BASE_EMBEDDED {
                        Label* if_false,
                        Handle<String> class_name,
                        Register input,
-                       Register temporary);
+                       Register temporary,
+                       Register scratch);
 
   int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
   int GetParameterCount() const { return scope()->num_parameters(); }