Mark null and undefined as undetectable, and use it to handle abstract equality comparison in the g…

src/runtime/runtime-interpreter.cc

 // Copyright 2015 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/runtime/runtime-utils.h"
 
 #include <iomanip>
 
 #include "src/arguments.h"
 #include "src/frames-inl.h"
@@ skipping 117 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_InterpreterLogicalNot) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(Object, x, 0);
   return isolate->heap()->ToBoolean(!x->BooleanValue());
 }
 
 
 RUNTIME_FUNCTION(Runtime_InterpreterTypeOf) {
-  SealHandleScope shs(isolate);
+  HandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, x, 0);
   return Object::cast(*Object::TypeOf(isolate, x));
 }
 
 
 RUNTIME_FUNCTION(Runtime_InterpreterNewClosure) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
@@ skipping 115 matching lines @@
 RUNTIME_FUNCTION(Runtime_InterpreterSetPendingMessage) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, message, 0);
   isolate->thread_local_top()->pending_message_obj_ = *message;
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8