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

test/mjsunit/harmony/regress/regress-2225.js

Index: test/mjsunit/harmony/regress/regress-2225.js
diff --git a/test/mjsunit/harmony/regress/regress-2225.js b/test/mjsunit/harmony/regress/regress-2225.js
index 9957d8d463dc7c6dc3f2f30a718ea75ec9b83514..12d3eee116a0c4ddd0269cb08832374b58df912e 100644
--- a/test/mjsunit/harmony/regress/regress-2225.js
+++ b/test/mjsunit/harmony/regress/regress-2225.js
@@ -28,7 +28,7 @@
 // Flags: --harmony-proxies
 
 var proxy_has_x = false;
-var proxy = Proxy.create({ getPropertyDescriptor:function(key) {
+var proxy = new Proxy({}, { getPropertyDescriptor:function(key) {
   assertSame('x', key);
   if (proxy_has_x) {
     return { configurable:true, writable:false, value:19 };