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

test/mjsunit/harmony/regress/regress-crbug-448730.js

Index: test/mjsunit/harmony/regress/regress-crbug-448730.js
diff --git a/test/mjsunit/harmony/regress/regress-crbug-448730.js b/test/mjsunit/harmony/regress/regress-crbug-448730.js
index 31d276aa839cdf649b2da1ad54138cc4f9418b81..cf261276431cc2f7569c002b69de005c06540aea 100644
--- a/test/mjsunit/harmony/regress/regress-crbug-448730.js
+++ b/test/mjsunit/harmony/regress/regress-crbug-448730.js
@@ -5,7 +5,7 @@
 // Flags: --allow-natives-syntax --harmony-proxies
 
 function bar() {}
-bar({ a: Proxy.create({}) });
+bar({ a: new Proxy({}, {}) });
 function foo(x) { x.a.b == ""; }
 var x = {a: {b: "" }};
 foo(x);