[debug] use catch prediction flag for promise rejections.

src/js/promise.js

 // 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.
 
 (function(global, utils, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 70 matching lines @@
   }
   if (IS_UNDEFINED(new.target)) throw MakeTypeError(kNotAPromise, this);
   if (!IS_CALLABLE(executor)) {
     throw MakeTypeError(kResolverNotAFunction, executor);
   }
 
   var promise = PromiseInit(%_NewObject(GlobalPromise, new.target));
   var callbacks = CreateResolvingFunctions(promise);
   var debug_is_active = DEBUG_IS_ACTIVE;
   try {
-    if (debug_is_active) %DebugPushPromise(promise, Promise);
+    if (debug_is_active) %DebugPushPromise(promise);
     executor(callbacks.resolve, callbacks.reject);
-  } catch (e) {
+  } %catch (e) {  // Natives syntax to mark this catch block.
     %_Call(callbacks.reject, UNDEFINED, e);
   } finally {
     if (debug_is_active) %DebugPopPromise();
   }
 
   return promise;
 }
 
 // Core functionality.
 
@@ skipping 46 matching lines @@
       var deferreds = GET_PRIVATE(promise, promiseDeferredReactionsSymbol);
       PromiseEnqueue(value, tasks, deferreds, status);
     }
     PromiseSet(promise, status, value);
   }
 }
 
 function PromiseHandle(value, handler, deferred) {
   var debug_is_active = DEBUG_IS_ACTIVE;
   try {
-    if (debug_is_active) %DebugPushPromise(deferred.promise, PromiseHandle);
+    if (debug_is_active) %DebugPushPromise(deferred.promise);
     var result = handler(value);
     deferred.resolve(result);
-  } catch (exception) {
+  } %catch (exception) {  // Natives syntax to mark this catch block.
     try { deferred.reject(exception); } catch (e) { }
   } finally {
     if (debug_is_active) %DebugPopPromise();
   }
 }
 
 function PromiseEnqueue(value, tasks, deferreds, status) {
   var id, name, instrumenting = DEBUG_IS_ACTIVE;
   %EnqueueMicrotask(function() {
     if (instrumenting) {
@@ skipping 445 matching lines @@
   to.PromiseChain = PromiseChain;
   to.PromiseDefer = PromiseDefer;
   to.PromiseAccept = PromiseAccept;
 
   to.PromiseCreateRejected = PromiseCreateRejected;
   to.PromiseCreateResolved = PromiseCreateResolved;
   to.PromiseThen = PromiseThen;
 });
 
 })