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

src/compiler/x64/linkage-x64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
 #include "src/code-stubs.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/linkage-impl.h"
@@ skipping 54 matching lines @@
 
 CallDescriptor* Linkage::GetStubCallDescriptor(
     CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count,
     CallDescriptor::DeoptimizationSupport can_deoptimize, Zone* zone) {
   return LinkageHelper::GetStubCallDescriptor<LinkageHelperTraits>(
       zone, descriptor, stack_parameter_count, can_deoptimize);
 }
 
 
 CallDescriptor* Linkage::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) {
   return LinkageHelper::GetSimplifiedCDescriptor<LinkageHelperTraits>(
       zone, num_params, return_type, param_types);
 }
 
 }
 }
 }  // namespace v8::internal::compiler