[promises] Move PromiseReject to c++

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 585 matching lines @@
 // JavaScript defines two kinds of 'nil'.
 enum NilValue { kNullValue, kUndefinedValue };
 
 // ParseRestriction is used to restrict the set of valid statements in a
 // unit of compilation.  Restriction violations cause a syntax error.
 enum ParseRestriction {
   NO_PARSE_RESTRICTION,         // All expressions are allowed.
   ONLY_SINGLE_FUNCTION_LITERAL  // Only a single FunctionLiteral expression.
 };
 
+// TODO(gsathya): Move this to JSPromise once we create it.
+// This should be in sync with the constants in promise.js
+enum PromiseStatus {
+  kPromisePending,
+  kPromiseFulfilled,
+  kPromiseRejected,
+};
+
 // A CodeDesc describes a buffer holding instructions and relocation
 // information. The instructions start at the beginning of the buffer
 // and grow forward, the relocation information starts at the end of
 // the buffer and grows backward.  A constant pool may exist at the
 // end of the instructions.
 //
 //  |<--------------- buffer_size ----------------------------------->|
 //  |<------------- instr_size ---------->|        |<-- reloc_size -->|
 //  |               |<- const_pool_size ->|                           |
 //  +=====================================+========+==================+
@@ skipping 654 matching lines @@
   UNREACHABLE();
   return os;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_