[api] Prototype WeakRef implementation

src/compiler/types.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <iomanip>
 
 #include "src/compiler/types.h"
 
 #include "src/handles-inl.h"
 #include "src/objects-inl.h"
@@ skipping 248 matching lines @@
     case JS_FAST_SMI_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_TYPE:
     case JS_GENERIC_ARRAY_VALUE_ITERATOR_TYPE:
 
     case JS_WEAK_MAP_TYPE:
     case JS_WEAK_SET_TYPE:
+    case JS_WEAK_REF_TYPE:
     case JS_PROMISE_CAPABILITY_TYPE:
     case JS_PROMISE_TYPE:
       DCHECK(!map->is_callable());
       DCHECK(!map->is_undetectable());
       return kOtherObject;
     case JS_BOUND_FUNCTION_TYPE:
       DCHECK(!map->is_undetectable());
       return kBoundFunction;
     case JS_FUNCTION_TYPE:
       DCHECK(!map->is_undetectable());
@@ skipping 777 matching lines @@
   return i::SmiValuesAre31Bits() ? kSigned31 : kSigned32;
 }
 
 BitsetType::bitset BitsetType::UnsignedSmall() {
   return i::SmiValuesAre31Bits() ? kUnsigned30 : kUnsigned31;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8