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

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 90f1c6701b3e318edccc613e0b258b1aa9f10980..4d042ea3c66d702df788f00dcaf797b0241808eb 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1147,19 +1147,6 @@
                           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(),
@@ -2528,9 +2515,8 @@
   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),