Make index translate/inobject only rely on the map.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index a1e8f211161e9c42cbfeffa0f9d9d3eb9818bcae..c41421ea9da26f8a3fd233da4ce6c431c2b06e4e 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -1278,13 +1278,13 @@ void LoadStubCompiler::GenerateLoadField(Register reg,
                                          Representation representation) {
   if (!reg.is(receiver())) __ movq(receiver(), reg);
   if (kind() == Code::LOAD_IC) {
-    LoadFieldStub stub(field.is_inobject(holder),
-                       field.translate(holder),
+    LoadFieldStub stub(field.is_inobject(holder->map()),
+                       field.translate(holder->map()),
                        representation);
     GenerateTailCall(masm(), stub.GetCode(isolate()));
   } else {
-    KeyedLoadFieldStub stub(field.is_inobject(holder),
-                            field.translate(holder),
+    KeyedLoadFieldStub stub(field.is_inobject(holder->map()),
+                            field.translate(holder->map()),
                             representation);
     GenerateTailCall(masm(), stub.GetCode(isolate()));
   }
@@ -1568,8 +1568,9 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
   Register reg = CheckPrototypes(object, rdx, holder, rbx, rax, rdi,
                                  name, &miss);
 
-  GenerateFastPropertyLoad(masm(), rdi, reg, index.is_inobject(holder),
-                           index.translate(holder), Representation::Tagged());
+  GenerateFastPropertyLoad(
+      masm(), rdi, reg, index.is_inobject(holder->map()),
+      index.translate(holder->map()), Representation::Tagged());
 
   // Check that the function really is a function.
   __ JumpIfSmi(rdi, &miss);