new classes: implement default constructors.

src/globals.h

 // Copyright 2012 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.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 805 matching lines @@
 
 enum FunctionKind {
   kNormalFunction = 0,
   kArrowFunction = 1 << 0,
   kGeneratorFunction = 1 << 1,
   kConciseMethod = 1 << 2,
   kConciseGeneratorMethod = kGeneratorFunction | kConciseMethod,
   kAccessorFunction = 1 << 3,
   kDefaultConstructor = 1 << 4,
   kSubclassConstructor = 1 << 5,
-  kBaseConstructor = 1 << 6
+  kBaseConstructor = 1 << 6,
+  kDefaultBaseConstructor = kDefaultConstructor | kBaseConstructor,
+  kDefaultSubclassConstructor = kDefaultConstructor | kSubclassConstructor,
 };
 
 
 inline bool IsValidFunctionKind(FunctionKind kind) {
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
          kind == FunctionKind::kGeneratorFunction ||
          kind == FunctionKind::kConciseMethod ||
          kind == FunctionKind::kConciseGeneratorMethod ||
          kind == FunctionKind::kAccessorFunction ||
-         kind == FunctionKind::kDefaultConstructor ||
+         kind == FunctionKind::kDefaultBaseConstructor ||
+         kind == FunctionKind::kDefaultSubclassConstructor ||
          kind == FunctionKind::kBaseConstructor ||
          kind == FunctionKind::kSubclassConstructor;
 }
 
 
 inline bool IsArrowFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kArrowFunction;
 }
 
@@ skipping 38 matching lines @@
   DCHECK(IsValidFunctionKind(kind));
   return kind &
          (FunctionKind::kBaseConstructor | FunctionKind::kSubclassConstructor |
           FunctionKind::kDefaultConstructor);
 }
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_