Implement symbol @@hasInstance for ES6 instanceof support.

src/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_H_
 #define V8_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 84 matching lines @@
   V(DatePrototypeToUTCString, kNone)                           \
   V(DatePrototypeToString, kNone)                              \
   V(DatePrototypeToTimeString, kNone)                          \
   V(DatePrototypeValueOf, kNone)                               \
   V(DatePrototypeGetYear, kNone)                               \
   V(DatePrototypeSetYear, kNone)                               \
                                                                \
   V(FunctionConstructor, kTargetAndNewTarget)                  \
   V(FunctionPrototypeBind, kNone)                              \
   V(FunctionPrototypeToString, kNone)                          \
+  V(FunctionHasInstance, kNone)                                \
                                                                \
   V(GeneratorFunctionConstructor, kTargetAndNewTarget)         \
                                                                \
   V(GlobalEval, kTarget)                                       \
                                                                \
   V(ObjectAssign, kNone)                                       \
   V(ObjectCreate, kNone)                                       \
   V(ObjectFreeze, kNone)                                       \
   V(ObjectGetOwnPropertyDescriptor, kNone)                     \
   V(ObjectGetOwnPropertyNames, kNone)                          \
@@ skipping 487 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_