Turn off tracking of fields for the roll.

src/property-details.h

Index: src/property-details.h
diff --git a/src/property-details.h b/src/property-details.h
index dc8c9f235082b554448c8ba9e5bf73f97612106b..62140fe9629944f6a1a91afeb8195690adb9050e 100644
--- a/src/property-details.h
+++ b/src/property-details.h
@@ -108,10 +108,6 @@ class Representation {
         (!IsDouble() && !other.IsDouble());
   }
 
-  bool IsCompatibleForStore(const Representation& other) const {
-    return Equals(other);
-  }
-
   bool is_more_general_than(const Representation& other) const {
     ASSERT(kind_ != kExternal);
     ASSERT(other.kind_ != kExternal);