--debug-code: sanity-checking instrumentation for Lithium object accesses

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index acf1d15d8fb06e824c9521db01e83007b9587623..bec3a0099ede43483156784cacb1828704b77789 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -2424,7 +2424,8 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
           ASSERT(String::Equals(isolate()->factory()->length_string(), name_));
           *access = HObjectAccess::ForArrayLength(map()->elements_kind());
         } else {
-          *access = HObjectAccess::ForMapAndOffset(map(), offset);
+          *access = HObjectAccess::ForMapAndOffset(map(), offset,
+                                                   HObjectAccess::FOR_FIELD);
         }
         return true;
       }