Remove FieldType::Iterator.

src/ic/x64/handler-compiler-x64.cc

Index: src/ic/x64/handler-compiler-x64.cc
diff --git a/src/ic/x64/handler-compiler-x64.cc b/src/ic/x64/handler-compiler-x64.cc
index 1736a5ed43a52fa43f442f63794b7772fb1532c7..991180e00a0df23c902505e1caa8c487fec4614b 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -403,20 +403,12 @@ void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(FieldType* field_type,
   DCHECK(!value_reg.is(map_reg));
   DCHECK(!value_reg.is(scratch));
   __ JumpIfSmi(value_reg, miss_label);
-  FieldType::Iterator it = field_type->Classes();
-  if (!it.Done()) {
+  if (field_type->IsClass()) {
     Label do_store;
     __ movp(map_reg, FieldOperand(value_reg, HeapObject::kMapOffset));
-    while (true) {
-      __ CmpWeakValue(map_reg, Map::WeakCellForMap(it.Current()), scratch);
-      it.Advance();
-      if (it.Done()) {
-        __ j(not_equal, miss_label);
-        break;
-      }
-      __ j(equal, &do_store, Label::kNear);
-    }
-    __ bind(&do_store);
+    __ CmpWeakValue(map_reg, Map::WeakCellForMap(field_type->AsClass()),
+                    scratch);
+    __ j(not_equal, miss_label);
   }
 }