[promises] Move PromiseReject to c++

src/runtime/runtime-debug.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 "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/debug-scopes.h"
@@ skipping 238 matching lines @@
     return factory->NewJSArrayWithElements(result);
   } else if (object->IsJSPromise()) {
     Handle<JSObject> promise = Handle<JSObject>::cast(object);
 
     Handle<Object> status_obj =
         DebugGetProperty(promise, isolate->factory()->promise_state_symbol());
     CHECK(status_obj->IsSmi());
     const char* status = "rejected";
     int status_val = Handle<Smi>::cast(status_obj)->value();
     switch (status_val) {
-      case +1:
+      case kPromiseFulfilled:
         status = "resolved";
         break;
-      case 0:
+      case kPromisePending:
         status = "pending";
         break;
       default:
-        DCHECK_EQ(-1, status_val);
+        DCHECK_EQ(kPromiseRejected, status_val);
     }
 
     Handle<FixedArray> result = factory->NewFixedArray(2 * 2);
     Handle<String> promise_status =
         factory->NewStringFromAsciiChecked("[[PromiseStatus]]");
     result->set(0, *promise_status);
     Handle<String> status_str = factory->NewStringFromAsciiChecked(status);
     result->set(1, *status_str);
 
     Handle<Object> value_obj =
@@ skipping 1597 matching lines @@
   Handle<Script> script = Handle<Script>(Script::cast(script_val->value()));
 
   Handle<wasm::WasmDebugInfo> debug_info =
       wasm::GetDebugInfo(handle(script->wasm_instance(), isolate));
   return *wasm::WasmDebugInfo::DisassembleFunction(
       debug_info, script->wasm_function_index());
 }
 
 }  // namespace internal
 }  // namespace v8