Cleaning up usage of lookup results.

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index 967ce4a605b43ae6fff48cc923b4606d41a5f8fa..1cfa2bbae27545b43c3a216c2c98539c83a4dd68 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -1318,7 +1318,7 @@ void StubCompiler::GenerateLoadInterceptor(Handle<JSObject> object,
   // later.
   bool compile_followup_inline = false;
   if (lookup->IsFound() && lookup->IsCacheable()) {
-    if (lookup->type() == FIELD) {
+    if (lookup->IsField()) {
       compile_followup_inline = true;
     } else if (lookup->type() == CALLBACKS &&
         lookup->GetCallbackObject()->IsAccessorInfo()) {
@@ -1391,7 +1391,7 @@ void StubCompiler::GenerateLoadInterceptor(Handle<JSObject> object,
                                    miss);
     }
 
-    if (lookup->type() == FIELD) {
+    if (lookup->IsField()) {
       // We found FIELD property in prototype chain of interceptor's holder.
       // Retrieve a field from field's holder.
       GenerateFastPropertyLoad(masm(), v0, holder_reg,