[runtime] Remove specific Descriptor subclasses and add respective factory methods instead.

test/cctest/test-field-type-tracking.cc

 // Copyright 2015 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 <stdlib.h>
 #include <utility>
 
 #include "test/cctest/test-api.h"
 
 #include "src/v8.h"
@@ skipping 358 matching lines @@
 
   Handle<Map> AddAccessorConstant(Handle<Map> map,
                                   PropertyAttributes attributes,
                                   Handle<AccessorPair> pair) {
     CHECK_EQ(number_of_properties_, map->NumberOfOwnDescriptors());
     int property_index = number_of_properties_++;
     SetAccessorConstant(property_index, attributes, pair);
 
     Handle<String> name = MakeName("prop", property_index);
 
-    AccessorConstantDescriptor new_desc(name, pair, attributes);
-    return Map::CopyInsertDescriptor(map, &new_desc, INSERT_TRANSITION);
+    Descriptor d = Descriptor::AccessorConstant(name, pair, attributes);
+    return Map::CopyInsertDescriptor(map, &d, INSERT_TRANSITION);
   }
 
   Handle<Map> AddAccessorConstant(Handle<Map> map,
                                   PropertyAttributes attributes,
                                   Handle<Object> getter,
                                   Handle<Object> setter) {
     CHECK_EQ(number_of_properties_, map->NumberOfOwnDescriptors());
     int property_index = number_of_properties_++;
     SetAccessorConstant(property_index, attributes, getter, setter);
 
     Handle<String> name = MakeName("prop", property_index);
 
     CHECK(!getter->IsNull(isolate_) || !setter->IsNull(isolate_));
     Factory* factory = isolate_->factory();
 
     if (!getter->IsNull(isolate_)) {
       Handle<AccessorPair> pair = factory->NewAccessorPair();
       pair->SetComponents(*getter, *factory->null_value());
-      AccessorConstantDescriptor new_desc(name, pair, attributes);
-      map = Map::CopyInsertDescriptor(map, &new_desc, INSERT_TRANSITION);
+      Descriptor d = Descriptor::AccessorConstant(name, pair, attributes);
+      map = Map::CopyInsertDescriptor(map, &d, INSERT_TRANSITION);
     }
     if (!setter->IsNull(isolate_)) {
       Handle<AccessorPair> pair = factory->NewAccessorPair();
       pair->SetComponents(*getter, *setter);
-      AccessorConstantDescriptor new_desc(name, pair, attributes);
-      map = Map::CopyInsertDescriptor(map, &new_desc, INSERT_TRANSITION);
+      Descriptor d = Descriptor::AccessorConstant(name, pair, attributes);
+      map = Map::CopyInsertDescriptor(map, &d, INSERT_TRANSITION);
     }
     return map;
   }
 
   Handle<Map> TransitionToAccessorConstant(Handle<Map> map,
                                            PropertyAttributes attributes,
                                            Handle<AccessorPair> pair) {
     CHECK_EQ(number_of_properties_, map->NumberOfOwnDescriptors());
     int property_index = number_of_properties_++;
     SetAccessorConstant(property_index, attributes, pair);
@@ skipping 2000 matching lines @@
   Isolate* isolate = CcTest::i_isolate();
 
   Zone zone(isolate->allocator(), ZONE_NAME);
 
   CHECK_EQ(FieldType::Any()->Convert(&zone), AstType::NonInternal());
   CHECK_EQ(FieldType::None()->Convert(&zone), AstType::None());
 }
 
 // TODO(ishell): add this test once IS_ACCESSOR_FIELD_SUPPORTED is supported.
 // TEST(TransitionAccessorConstantToAnotherAccessorConstant)