[async-await] Remove RejectPromiseNoDebugEvent

Just desugar directly into the runtime call instead.

BUG=v8:5639

Review-Url: https://codereview.chromium.org/2633353002
Cr-Commit-Position: refs/heads/master@{#42492}

src/contexts.h

@@ -107,8 +107,6 @@ enum ContextLookupFlags {
   V(PROMISE_ID_RESOLVE_HANDLER_INDEX, JSFunction, promise_id_resolve_handler) \
   V(PROMISE_ID_REJECT_HANDLER_INDEX, JSFunction, promise_id_reject_handler)   \
   V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function)             \
-  V(REJECT_PROMISE_NO_DEBUG_EVENT_INDEX, JSFunction,                          \
-    reject_promise_no_debug_event)                                            \
   V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function)     \
   V(SET_ADD_METHOD_INDEX, JSFunction, set_add)                                \
   V(SET_DELETE_METHOD_INDEX, JSFunction, set_delete)                          \

src/js/async-await.js

@@ -106,11 +106,6 @@ function AsyncFunctionAwaitCaught(generator, awaited, outerPromise) {
   AsyncFunctionAwait(generator, awaited, outerPromise);
 }
 
-// How the parser rejects promises from async/await desugaring
-function RejectPromiseNoDebugEvent(promise, reason) {
-  return %promise_internal_reject(promise, reason, false);
-}
-
 function AsyncFunctionPromiseCreate() {
   var promise = %promise_internal_constructor(UNDEFINED);
   if (DEBUG_IS_ACTIVE) {
@@ -135,7 +130,6 @@ function AsyncFunctionPromiseRelease(promise) {
 %InstallToContext([
   "async_function_await_caught", AsyncFunctionAwaitCaught,
   "async_function_await_uncaught", AsyncFunctionAwaitUncaught,
-  "reject_promise_no_debug_event", RejectPromiseNoDebugEvent,
   "async_function_promise_create", AsyncFunctionPromiseCreate,
   "async_function_promise_release", AsyncFunctionPromiseRelease,
 ]);

src/parsing/parser.cc

@@ -3018,15 +3018,15 @@ Expression* Parser::BuildResolvePromise(Expression* value, int pos) {
 }
 
 Expression* Parser::BuildRejectPromise(Expression* value, int pos) {
-  // %RejectPromiseNoDebugEvent(.promise, value, true), .promise
-  // The NoDebugEvent variant disables the additional debug event for the
-  // rejection since a debug event already happened for the exception that got
-  // us here.
-  ZoneList<Expression*>* args = new (zone()) ZoneList<Expression*>(2, zone());
+  // %promise_internal_reject(.promise, value, false), .promise
+  // Disables the additional debug event for the rejection since a debug event
+  // already happened for the exception that got us here.
+  ZoneList<Expression*>* args = new (zone()) ZoneList<Expression*>(3, zone());
   args->Add(factory()->NewVariableProxy(PromiseVariable()), zone());
   args->Add(value, zone());
+  args->Add(factory()->NewBooleanLiteral(false, pos), zone());
   Expression* call_runtime = factory()->NewCallRuntime(
-      Context::REJECT_PROMISE_NO_DEBUG_EVENT_INDEX, args, pos);
+      Context::PROMISE_INTERNAL_REJECT_INDEX, args, pos);
   return factory()->NewBinaryOperation(
       Token::COMMA, call_runtime,
       factory()->NewVariableProxy(PromiseVariable()), pos);