[builtins] Object.prototype.toString() as TurboFan stub.

src/builtins/builtins.h

 // Copyright 2011 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_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 313 matching lines @@
   CPP(ObjectGetPrototypeOf)                                                 \
   TFJ(ObjectHasOwnProperty, 2)                                              \
   CPP(ObjectIs)                                                             \
   CPP(ObjectIsExtensible)                                                   \
   CPP(ObjectIsFrozen)                                                       \
   CPP(ObjectIsSealed)                                                       \
   CPP(ObjectKeys)                                                           \
   CPP(ObjectLookupGetter)                                                   \
   CPP(ObjectLookupSetter)                                                   \
   CPP(ObjectPreventExtensions)                                              \
+  TFJ(ObjectProtoToString, 1)                                               \
   CPP(ObjectPrototypePropertyIsEnumerable)                                  \
-  CPP(ObjectProtoToString)                                                  \
   CPP(ObjectSeal)                                                           \
   CPP(ObjectValues)                                                         \
   /* Proxy */                                                               \
   CPP(ProxyConstructor)                                                     \
   CPP(ProxyConstructor_ConstructStub)                                       \
   /* Reflect */                                                             \
   ASM(ReflectApply)                                                         \
   ASM(ReflectConstruct)                                                     \
   CPP(ReflectDefineProperty)                                                \
   CPP(ReflectDeleteProperty)                                                \
@@ skipping 393 matching lines @@
   // ES6 section 25.3.1.2 Generator.prototype.next ( value )
   static void Generate_GeneratorPrototypeNext(CodeStubAssembler* assembler);
   // ES6 section 25.3.1.3 Generator.prototype.return ( value )
   static void Generate_GeneratorPrototypeReturn(CodeStubAssembler* assembler);
   // ES6 section 25.3.1.4 Generator.prototype.throw ( exception )
   static void Generate_GeneratorPrototypeThrow(CodeStubAssembler* assembler);
 
   // ES6 section 19.1.3.2 Object.prototype.hasOwnProperty
   static void Generate_ObjectHasOwnProperty(CodeStubAssembler* assembler);
 
+  // ES6 section 19.1.3.6 Object.prototype.toString ()
+  static void Generate_ObjectProtoToString(CodeStubAssembler* assembler);
+
   // ES6 section 22.1.2.2 Array.isArray
   static void Generate_ArrayIsArray(CodeStubAssembler* assembler);
 
   // ES6 section 21.1.2.1 String.fromCharCode ( ...codeUnits )
   static void Generate_StringFromCharCode(CodeStubAssembler* assembler);
   // ES6 section 21.1.3.1 String.prototype.charAt ( pos )
   static void Generate_StringPrototypeCharAt(CodeStubAssembler* assembler);
   // ES6 section 21.1.3.2 String.prototype.charCodeAt ( pos )
   static void Generate_StringPrototypeCharCodeAt(CodeStubAssembler* assembler);
   // ES6 section 21.1.3.25 String.prototype.toString ()
@@ skipping 71 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_