Cleaning up usage of lookup results.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 5d4316af1c8d4adde1770818d74d367cc52d78be..06d041281fa2ca2af7c51c6196d01ab50788d5e1 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -2286,7 +2286,7 @@ void LCodeGen::EmitLoadFieldOrConstantFunction(Register result,
   LookupResult lookup(isolate());
   type->LookupInDescriptors(NULL, *name, &lookup);
   ASSERT(lookup.IsFound() || lookup.IsCacheable());
-  if (lookup.IsFound() && lookup.type() == FIELD) {
+  if (lookup.IsField()) {
     int index = lookup.GetLocalFieldIndexFromMap(*type);
     int offset = index * kPointerSize;
     if (index < 0) {
@@ -2298,7 +2298,7 @@ void LCodeGen::EmitLoadFieldOrConstantFunction(Register result,
       __ movq(result, FieldOperand(object, JSObject::kPropertiesOffset));
       __ movq(result, FieldOperand(result, offset + FixedArray::kHeaderSize));
     }
-  } else if (lookup.IsFound() && lookup.type() == CONSTANT_FUNCTION) {
+  } else if (lookup.IsConstantFunction()) {
     Handle<JSFunction> function(lookup.GetConstantFunctionFromMap(*type));
     __ LoadHeapObject(result, function);
   } else {
@@ -2326,8 +2326,7 @@ static bool CompactEmit(
   LookupResult lookup(isolate);
   Handle<Map> map = list->at(i);
   map->LookupInDescriptors(NULL, *name, &lookup);
-  return lookup.IsFound() &&
-      (lookup.type() == FIELD || lookup.type() == CONSTANT_FUNCTION);
+  return lookup.IsField() || lookup.IsConstantFunction();
 }