[promises] Remove runtime call from fastpath in PromiseReject

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/compiler.h"
 #include "src/debug/debug-evaluate.h"
 #include "src/debug/debug-frames.h"
@@ skipping 1879 matching lines @@
   int id = isolate->debug()->NextAsyncTaskId(promise);
   Handle<Symbol> async_stack_id_symbol =
       isolate->factory()->promise_async_stack_id_symbol();
   JSObject::SetProperty(promise, async_stack_id_symbol,
                         handle(Smi::FromInt(id), isolate), STRICT)
       .Assert();
   isolate->debug()->OnAsyncTaskEvent(debug::kDebugEnqueueAsyncFunction, id);
   return isolate->heap()->undefined_value();
 }
 
+RUNTIME_FUNCTION(Runtime_DebugPromiseReject) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(2, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSPromise, rejected_promise, 0);
+  CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
+
+  isolate->debug()->OnPromiseReject(rejected_promise, value);
+  return isolate->heap()->undefined_value();
+}
+
 RUNTIME_FUNCTION(Runtime_DebugAsyncEventEnqueueRecurring) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
   CONVERT_SMI_ARG_CHECKED(status, 1);
   if (isolate->debug()->is_active()) {
     isolate->debug()->OnAsyncTaskEvent(
         status == v8::Promise::kFulfilled ? debug::kDebugEnqueuePromiseResolve
                                           : debug::kDebugEnqueuePromiseReject,
         isolate->debug()->NextAsyncTaskId(promise));
   }
   return isolate->heap()->undefined_value();
 }
 
 RUNTIME_FUNCTION(Runtime_DebugIsActive) {
   SealHandleScope shs(isolate);
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 }  // namespace internal
 }  // namespace v8