[turbofan] Properly implement %_ClassOf intrinsic.

src/code-factory.cc

 // Copyright 2014 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.
 
 #include "src/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 
 namespace v8 {
@@ skipping 217 matching lines @@
 TFS_BUILTIN(CreateIterResultObject)
 TFS_BUILTIN(HasProperty)
 TFS_BUILTIN(NonNumberToNumber)
 TFS_BUILTIN(StringToNumber)
 TFS_BUILTIN(ToBoolean)
 TFS_BUILTIN(ToInteger)
 TFS_BUILTIN(ToLength)
 TFS_BUILTIN(ToName)
 TFS_BUILTIN(ToNumber)
 TFS_BUILTIN(ToObject)
+TFS_BUILTIN(ClassOf)
 TFS_BUILTIN(Typeof)
 TFS_BUILTIN(InstanceOf)
 TFS_BUILTIN(OrdinaryHasInstance)
 TFS_BUILTIN(CopyFastSmiOrObjectElements)
 TFS_BUILTIN(GrowFastDoubleElements)
 TFS_BUILTIN(GrowFastSmiOrObjectElements)
 TFS_BUILTIN(NewUnmappedArgumentsElements)
 TFS_BUILTIN(NewRestParameterElements)
 TFS_BUILTIN(FastCloneRegExp)
 TFS_BUILTIN(FastNewClosure)
@@ skipping 190 matching lines @@
 }
 
 // static
 Callable CodeFactory::FunctionPrototypeBind(Isolate* isolate) {
   return Callable(isolate->builtins()->FunctionPrototypeBind(),
                   BuiltinDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8