[stubs] Introduce NonPrimitiveToPrimitive builtin.

src/globals.h

 // 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.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 766 matching lines @@
   switch (mode) {
     case TailCallMode::kAllow:
       return os << "ALLOW_TAIL_CALLS";
     case TailCallMode::kDisallow:
       return os << "DISALLOW_TAIL_CALLS";
   }
   UNREACHABLE();
   return os;
 }
 
+// Valid hints for the abstract operation OrdinaryToPrimitive,
+// implemented according to ES6, section 7.1.1.
+enum class OrdinaryToPrimitiveHint { kNumber, kString };
+
+// Valid hints for the abstract operation ToPrimitive,
+// implemented according to ES6, section 7.1.1.
+enum class ToPrimitiveHint { kDefault, kNumber, kString };
+
 // Defines specifics about arguments object or rest parameter creation.
 enum class CreateArgumentsType : uint8_t {
   kMappedArguments,
   kUnmappedArguments,
   kRestParameter
 };
 
 inline size_t hash_value(CreateArgumentsType type) {
   return bit_cast<uint8_t>(type);
 }
@@ skipping 322 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_