Move MachineRepresentation to machine-type.h and rename to MachineType in preparation for merging i…

src/compiler/linkage-impl.h

Index: src/compiler/linkage-impl.h
diff --git a/src/compiler/linkage-impl.h b/src/compiler/linkage-impl.h
index 36939cc6cc514167cba02e17a88af74b3cbc0d7c..e7aafc3885d8415554a170c8c53144260b49fa9d 100644
--- a/src/compiler/linkage-impl.h
+++ b/src/compiler/linkage-impl.h
@@ -25,7 +25,7 @@ class LinkageHelper {
                            Register::ToAllocationIndex(reg));
   }
 
-  static LinkageLocation UnconstrainedRegister(MachineRepresentation rep) {
+  static LinkageLocation UnconstrainedRegister(MachineType rep) {
     return LinkageLocation(rep, LinkageLocation::ANY_REGISTER);
   }
 
@@ -173,8 +173,8 @@ class LinkageHelper {
 
   template <typename LinkageTraits>
   static CallDescriptor* GetSimplifiedCDescriptor(
-      Zone* zone, int num_params, MachineRepresentation return_type,
-      const MachineRepresentation* param_types) {
+      Zone* zone, int num_params, MachineType return_type,
+      const MachineType* param_types) {
     LinkageLocation* locations =
         zone->NewArray<LinkageLocation>(num_params + 2);
     int index = 0;