Revert of [compiler] Properly guard the speculative optimizations for instanceof.

src/compiler/typer.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/compiler/typer.h"
 
 #include <iomanip>
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
@@ skipping 1594 matching lines @@
   Type* type = Operand(node, 0);
   return type;
 }
 
 Type* Typer::Visitor::TypeCheckTaggedHole(Node* node) {
   Type* type = Operand(node, 0);
   type = Type::Intersect(type, Type::NonInternal(), zone());
   return type;
 }
 
-Type* Typer::Visitor::TypeCheckHasInPrototypeChain(Node* node) {
-  return Type::Boolean();
-}
-
 Type* Typer::Visitor::TypeConvertTaggedHoleToUndefined(Node* node) {
   Type* type = Operand(node, 0);
   if (type->Maybe(Type::Hole())) {
     // Turn "the hole" into undefined.
     type = Type::Intersect(type, Type::NonInternal(), zone());
     type = Type::Union(type, Type::Undefined(), zone());
   }
   return type;
 }
 
@@ skipping 91 matching lines @@
 Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8