Revert of Implement symbol @@hasInstance for ES6 instanceof support.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1130 matching lines @@
     // Setup the methods on the %FunctionPrototype%.
     SimpleInstallFunction(prototype, factory->apply_string(),
                           Builtins::kFunctionPrototypeApply, 2, false);
     SimpleInstallFunction(prototype, factory->bind_string(),
                           Builtins::kFunctionPrototypeBind, 1, false);
     SimpleInstallFunction(prototype, factory->call_string(),
                           Builtins::kFunctionPrototypeCall, 1, false);
     SimpleInstallFunction(prototype, factory->toString_string(),
                           Builtins::kFunctionPrototypeToString, 0, false);
 
-    // Install the @@hasInstance function.
-    Handle<JSFunction> has_instance = InstallFunction(
-        prototype, factory->has_instance_symbol(), JS_OBJECT_TYPE,
-        JSObject::kHeaderSize, MaybeHandle<JSObject>(),
-        Builtins::kFunctionHasInstance,
-        static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY));
-
-    // Set the expected parameters for @@hasInstance to 1; required by builtin.
-    has_instance->shared()->set_internal_formal_parameter_count(1);
-
-    // Set the length for the function to satisfy ECMA-262.
-    has_instance->shared()->set_length(1);
-
     // Install the "constructor" property on the %FunctionPrototype%.
     JSObject::AddProperty(prototype, factory->constructor_string(),
                           function_fun, DONT_ENUM);
 
     sloppy_function_map_writable_prototype_->SetConstructor(*function_fun);
     strict_function_map_writable_prototype_->SetConstructor(*function_fun);
     native_context()->strong_function_map()->SetConstructor(*function_fun);
   }
 
   {  // --- A r r a y ---
@@ skipping 1347 matching lines @@
       JSGlobalObject::cast(native_context()->global_object()));
   Isolate* isolate = global->GetIsolate();
   Factory* factory = isolate->factory();
 
   InstallJSProxyMaps();
 
   // Create the Proxy object.
   Handle<String> name = factory->Proxy_string();
   Handle<Code> code(isolate->builtins()->ProxyConstructor());
 
-  Handle<JSFunction> proxy_function =
-      factory->NewFunction(isolate->proxy_function_map(),
-                           factory->Proxy_string(), MaybeHandle<Code>(code));
+  Handle<JSFunction> proxy_function = factory->NewFunction(
+      isolate->proxy_function_map(), factory->Proxy_string(), code);
 
   JSFunction::SetInitialMap(proxy_function,
                             Handle<Map>(native_context()->proxy_map(), isolate),
                             factory->null_value());
 
   proxy_function->shared()->set_construct_stub(
       *isolate->builtins()->ProxyConstructor_ConstructStub());
   proxy_function->shared()->set_internal_formal_parameter_count(2);
   proxy_function->shared()->set_length(2);
 
@@ skipping 1105 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8