[runtime] support new Proxy() instead of Proxy.create and install getPrototypeOf trap

src/runtime/runtime-proxy.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/factory.h"
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 
 RUNTIME_FUNCTION(Runtime_CreateJSProxy) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, handler, 0);
-  CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
-  if (!prototype->IsJSReceiver()) prototype = isolate->factory()->null_value();
-  return *isolate->factory()->NewJSProxy(handler, prototype);
+  DCHECK(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(JSProxy, instance, 0);
+  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, target, 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, handler, 2);
+  // TODO(cbruni): Remove once we don't support JSProxy.fix
+  instance->InitializeBody(instance->map()->instance_size(), Smi::FromInt(0));
+  if (!handler->IsJSReceiver()) handler = isolate->factory()->null_value();
+  instance->set_target(*target);
+  instance->set_handler(*handler);
+  instance->set_hash(isolate->heap()->undefined_value(), SKIP_WRITE_BARRIER);
+  return *instance;
 }
 
 
 RUNTIME_FUNCTION(Runtime_CreateJSFunctionProxy) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 4);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, handler, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, call_trap, 1);
   RUNTIME_ASSERT(call_trap->IsJSFunction() || call_trap->IsJSFunctionProxy());
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, construct_trap, 2);
@@ skipping 46 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_Fix) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, 0);
   JSProxy::Fix(proxy);
   return isolate->heap()->undefined_value();
 }
 }  // namespace internal
 }  // namespace v8