PropertyDetails cleanup: NORMAL property type merged with FIELD.

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index c7a61ea67a41830e9b2249b991c005ed421b3650..82f718319c709beefc48e5e4391677e7fe4dc6e2 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -4213,10 +4213,11 @@ void MacroAssembler::LoadFromNumberDictionary(Label* miss,
   }
 
   Bind(&done);
-  // Check that the value is a normal property.
+  // Check that the value is a field property.
   const int kDetailsOffset =
       SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize;
   Ldrsw(scratch1, UntagSmiFieldMemOperand(scratch2, kDetailsOffset));
+  DCHECK_EQ(FIELD, 0);
   TestAndBranchIfAnySet(scratch1, PropertyDetails::TypeField::kMask, miss);
 
   // Get the value at the masked, scaled index and return.