In HObjectAccess::ForField pass property name down into HObjectAccess for in-object fields.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 94f8f5e94a2563d5bc725d3df57ef89f593a9647..28617517163d6e589860dd2ac8030ad48f39e395 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -4345,7 +4345,7 @@ HObjectAccess HObjectAccess::ForField(Handle<Map> map,
     // Negative property indices are in-object properties, indexed
     // from the end of the fixed part of the object.
     int offset = (index * kPointerSize) + map->instance_size();
-    return HObjectAccess(kInobject, offset, representation);
+    return HObjectAccess(kInobject, offset, representation, name);
   } else {
     // Non-negative property indices are in the properties array.
     int offset = (index * kPointerSize) + FixedArray::kHeaderSize;