[promises] Move PromiseHasUserDefinedRejectHandler to c++

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 8637 matching lines @@
   // attached to a FixedArray.
   DECL_ACCESSORS(deferred, Object)
   DECL_ACCESSORS(fulfill_reactions, Object)
   DECL_ACCESSORS(reject_reactions, Object)
 
   DECL_INT_ACCESSORS(flags)
 
   // [has_handler]: Whether this promise has a reject handler or not.
   DECL_BOOLEAN_ACCESSORS(has_handler)
 
+  // [handled_hint]: Whether this promise will be handled by a catch
+  // block in an async function.
+  DECL_BOOLEAN_ACCESSORS(handled_hint)
+
   static const char* Status(int status);
 
   DECLARE_CAST(JSPromise)
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSPromise)
   DECLARE_VERIFIER(JSPromise)
 
   // Layout description.
   static const int kStatusOffset = JSObject::kHeaderSize;
   static const int kResultOffset = kStatusOffset + kPointerSize;
   static const int kDeferredOffset = kResultOffset + kPointerSize;
   static const int kFulfillReactionsOffset = kDeferredOffset + kPointerSize;
   static const int kRejectReactionsOffset =
       kFulfillReactionsOffset + kPointerSize;
   static const int kFlagsOffset = kRejectReactionsOffset + kPointerSize;
   static const int kSize = kFlagsOffset + kPointerSize;
 
   // Flags layout.
   static const int kHasHandlerBit = 0;
+  static const int kHandledHintBit = 1;
 };
 
 // Regular expressions
 // The regular expression holds a single reference to a FixedArray in
 // the kDataOffset field.
 // The FixedArray contains the following data:
 // - tag : type of regexp implementation (not compiled yet, atom or irregexp)
 // - reference to the original source string
 // - reference to the original flag string
 // If it is an atom regexp
@@ skipping 3020 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_