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

test/mjsunit/regress/regress-crbug-505907.js

Index: test/mjsunit/regress/regress-crbug-505907.js
diff --git a/test/mjsunit/regress/regress-crbug-505907.js b/test/mjsunit/regress/regress-crbug-505907.js
index 761261eca0f75e0ec2bcb8b63ae857cb7a3e5b68..c8d4bac9be5249af547ea3fcf58b8ef3cf8612ca 100644
--- a/test/mjsunit/regress/regress-crbug-505907.js
+++ b/test/mjsunit/regress/regress-crbug-505907.js
@@ -5,7 +5,9 @@
 // Flags: --harmony-proxies
 
 try {
-  var p = Proxy.create({ getPropertyDescriptor: function() { return [] } });
+  var p = new Proxy({}, {
+      getPropertyDescriptor: function() { return [] }
+    });
   var o = Object.create(p);
   with (o) { unresolved_name() }
 } catch(e) {