Remove runtime flags for Proxy and Reflect

test/mjsunit/es6/reflect-own-keys.js

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 // This is adapted from mjsunit/object-get-own-property-names.js.
 
-// Flags: --harmony-reflect
-
 
 // Check simple cases.
 var obj = { a: 1, b: 2};
 var keys = Reflect.ownKeys(obj);
 assertEquals(2, keys.length);
 assertEquals("a", keys[0]);
 assertEquals("b", keys[1]);
 
 var obj = { a: function(){}, b: function(){} };
 var keys = Reflect.ownKeys(obj);
@@ skipping 42 matching lines @@
 assertSame(Array.prototype, keys.__proto__);
 Array.prototype.concat = savedConcat;
 
 assertThrows(function() { Reflect.ownKeys(4) }, TypeError);
 assertThrows(function() { Reflect.ownKeys("foo") }, TypeError);
 assertThrows(function() { Reflect.ownKeys(true) }, TypeError);
 
 assertEquals(Reflect.ownKeys(Object(4)), []);
 assertEquals(Reflect.ownKeys(Object("foo")), ["0", "1", "2", "length"]);
 assertEquals(Reflect.ownKeys(Object(true)), []);